Horizontal force Definition and 102 Threads

Homework Statement A 5.0 kg mass is held against a wall with which it has a coefficient of static friction of 0.85. What is the minimum horizontal force required to hold the mass against the wall ? The teacher said answer is 58 N .. i can't get to that answer.. Homework Equations...

Correct? Please let me know if my logic is off. Given Problem A shopper pushes a 6.1 kg shopping cart up a 13° incline, as shown in the figure. Find the magnitude of the horizontal force, F, needed to give the cart an acceleration of 1.51 m/s2. Relevant equations F = ma Fy = F1cos13°...

A block of mass 4.0kg rests on a horizontal surface. What horizontal force is required to accelerate the block at 5.0m/s2 if the coefficient of kinetic friction is 0.25?

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Homework Statement A block is pushed up a frictionless incline by an applied horizontal force as shown. The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the resulting acceleration of the block? Answer in units of m/s^2. Homework Equations...

Homework Statement If it takes a horizontal force of 300N to push a stalled automobile along a level road at a constant speed, how much qwork must you do to push this automobile a distance of 5.0m? Homework Equations W = F x \Deltax The Attempt at a Solution I used the...

Homework Statement A 2.7 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 17.3 N. Find the speed of the block after it has moved 4 m. Answer in units of m/s. Homework Equations a=Fnet/mass The Attempt at...

How can we find the horizontal force required to move an object with the coefficient of static friction and the mass?? I just need a formula please, thankyou

Homework Statement A 2.0 kg block on an incline at a 60 degree angle is held in equilibrium by a horizontal force. A) Determine the magnitude of this horizontal force (disregard friction) B) Determine the magnitude of the normal force on the block. I have no idea which equation to use...

Homework Statement A horizontal force F of 16 N pushes a block weighing 6.0 N against a vertical wall (Fig. 5-47). The coefficient of static friction between the wall and the block is 0.61 and the coefficient of kinetic friction is 0.41. Assume that the block is not moving initially. (b)...

Homework Statement A couch cushion of mass m is released from rest at the top of a building having height h. A wind blowing along the side of the building exerts a constant horizontal force of magnitude F on the cushion as it drops as shown in the figure. The air exerts no vertical force...

Homework Statement A shopper pushes a 7.5 kg shopping cart up a 13 degree incline. Find the magnitude of the horizontal force needed to give the cart an acceleation of 1.41 m/s^2. Homework Equations F = m * a The Attempt at a Solution I am not sure how to set up the F(x) and...

Homework Statement A block of mass M_1 rests on a block of mass M_2 which lies on a frictionless table. The coefficient of friction between the blocks is \mu . What is the maximum horizontal force which can be applied to the lower ( M_2 ) block for the blocks to accelerate without...

Homework Statement In Figure 5-50a, a constant horizontal force F->a is applied to block A, which pushes against block B with a 23.0 N force directed horizontally to the right. In Figure 5-48b, the same force is applied to block B; now block A pushes on block B with a 11.0 N force directed...

A hors og mass 509 KG Pulls a sleigh of mass 255 KG and both horse and sleigh accelerate 0.5 m/s^2. the coefficient of friction for the sleigh is 0.150 as it moves over the snow. Find the horizontal force that the horse must exert on the sleigh. Remember sleighs have two identical blades on the...

Homework Statement http://img151.imageshack.us/img151/6641/torquebk4.jpg Homework Equations T=F*r F*X=Ia I=ML2/3 The Attempt at a Solution I was able to do part A easily enough, but I'm not quite sure where to even start with part B. I know that the force on the pivot point...

Homework Statement A symmetrical door of mass 27.5 kg is 5.44 m high and 2.46 wide. The hinges are placed at the very top and very bottom of the door. Find the magnitude of the horizontal force exerted by the lower hinge. Homework Equations Fd=Fd sum tau clockwise = sum tau...

Homework Statement Two veggieburger patties, in contact with each other, are being pushed across a grill. The masses of the burgers are 113 g and 139 g. Friction is negligible. The applied horizontal force of magnitude 5.38x10^-2 N is exerted on the more massiv burger. Determine a) the...

A square tank 12 feet high having a perimeter of 40 feet is filled with water weighing 62.4 pounds per cubic foot. The total horizontal force on one side of the tank due to the water pressure is MOST NEARLY ________ pounds. A. 58,000 B. 45,000 C. 36,000 D. 13,000 The answer key says...

[SOLVED] Finding a Vertical Force given friction and a horizontal force Homework Statement Problem: A box with a weight of 50 N rests on a horizontal surface. A person pulls horizontally on it with a force of 10 N and it does not move. To start it moving, a second person pulls vertically...

Homework Statement You use 30N (**Not 25 N, that was a typo) to slide a wooden box that is 12 kg across a floor at constant velocity. What is the coefficient of kinetic fricition? Homework Equations Ff=coeff of kinetic friction (mu k) m*g ?? not sure. The Attempt at a Solution...

3. A 52.3-kg trunk is pushed 5.95m at constant speed up a 28.0 degree incline by a constant horizontal force. The coefficient of kinetic friction between the trunk and the incline is .19 . Calculate the work done by a) the applied force and b) the force of gravity. Fy = N - mgcos28 = 0 Fx =...

Homework Statement A box (mass = 50.0 kg) is being pulled up a ramp at an angle of (27 ⁰) by a horizontal force, (F→). Given that the coefficient of kinetic friction for the ramp is 0.3, find the force, (F→) on the box. What is the reaction force on the box due to the tramp? (Identify...

Homework Statement A 30 kg chandelier hangs vertically from a 4 m long wire. What is the horizontal force necessary to displace the chandelier 0.10 m either way? Homework Equations F=ma The Attempt at a Solution I tried to figure out the angle made by the change in the...

Homework Statement A weightless ladder at 7m long rests against a frictionless wall at an angle of 65degrees to the ground. A 72kg person is 1.2m from the top of the ladder. What horizontal force at the bottom of the ladder is required to keep it from slipping? d= 7m m(man) = 72kg r(man) =...

Homework Statement There is a heavy box across the floor, and you apply a horizontal force just sufficient to get the box moving. As the box starts moving, you continue to apply the same force. Show that the acceleration of the box, once it gets started, is a=(us-uk)*g Homework...

A 125 kg mail bag hangs by a vertical rope 3.3 m long. A postal worker then displaces the bag to a position 2.0 m sideways from its original position, always keeping the rope taut. a)What horizontal force is necessary to hold the bag in the new position? b)As the bag is moved to this...

Homework Statement A simple pendulum (sting has no mass, no air resistance) has a weight on the end of mass m (unknown). The string has a length A horizontal (and always horizontal) force, F, acts on the weight, but it moves so slowly that acceleration is 0. a)What is the work done by force...

Homework Statement In general, I know that the dynamic equation of pendulum is theta'' + (k/m)*thata' + (g/l)*sin(theta) = 0 , where k=friction co, m=mass, l=length of string, g=gravity. But if the pendulum is placed in a constant draft, the equation has to be changed. Assuming...

1. A uniform 5m ladder of mass 12kg rests against a wall with its base 3m from the wall. A painter of mass 55kg sits 3.5m of the way up the ladder. what is the horizontal force in N exerted on the ladder by the wall? a)110.45 b)178.45 c)232.67 d)327.08 in the previous problem what is the...

Homework Statement A bicycle has 30cm radius tires with gear and pedal dimensions as shown. IF the maximum vertical force that a 70kg rider can exert is equal to his/her body weight, what is the horizontal force that can be exerted on the ground by the rear tire...

Two blocks (M1 = 5kg and M2= 10kg) are pushed so that M1 is not touching the ground (in the air). The horizontal surface is frictionless but there is a friction between the two blocks (mu_k = .4 and mu_s = .5). Find the minimum force F needed so that M1 will remain "in the air" as the blocks...

A 100 kg crate is pushed at constant speed up the frictionless 27° ramp shown in the figure. What horizontal force F is required? What force is exerted by the ramp on the crate? I can't paste the figure up so I hope this question describes the scenario well enough. What's giving me...

http://img151.imageshack.us/img151/8411/physicsks7.jpg http://www.glpics.com/cristianb/Pics/penguin%20physics.JPG How would I go about solving this problem? Do you just ignore the sled and snow friction? Any help would be great.

A shelf bracket is mounted on a vertical wall by a single screw, as shown in Figure P12.59. Neglecting the weight of the bracket, find the horizontal component of the force that the screw exerts on the bracket when an F = 86.0 N vertical force is applied as shown. Ok so we have three...

ok have a look at the diagram posted. When someone broke their femur (thigh bone) the muscles around the femur would compress tightly and thereby shorten the bone once it heals back. SO the apparatus described in the diagram is what they used to do to prevent the femur from growing back shorter...

A 50kg sprinter, starting from rest, runs 50m in 7.0s at constant acceleration. a) What is the magnitude of the horizontal force acting on the sprinter? b) What is the sprinter's power output at 2.0s, 4.0s, and 6.0s? I think maybe the 'magnitude' part is confusing me. F = ma V(avg) =...

Question? There is a Large Cube, with a mass of 25 kg, it is being accelerated across a horizontal FRICTIONLESS surface by a horizontal force P. There is a small cube with a mass of 4 kg in contact with the front surface and will slide down and fall off unless P is sufficiently large. The...

Theory says that a cubical box when subjected to a force horizontally(not at the centre of gravity) then the force will tend to rotate the box around the centre of gravity. Any proof can be given for this?

how do you figure out horizontal force necessary to move an object if the coefficient of kinetic friction is zero?

The figure shows a small object of mass m = 1kg can slide without friction on a wedge of mass M = 3kg inclined at angle \delta=30 degree . What horizontal force F must be applied to the wedge if the small block is not to move with respect to the wedge? I do it in this way: By Newton`s 3rd...

Two masses M1=3.80kg and M2=8.10kg are stacked on top of each other as shown in the figure. The static coefficient of friction between M1 and M2 is μs=0.400. There is no friction between M2 and the surface below it. What is the maximum horizontal force that can be applied to M1 without M1...

How do i find out the horizontal force the wheels on a toy car exert on the ground if i know the acceleration and the coefficient of friction? I have a coefficient of friction of 0.62 and an acceleration of 0.40056 m/s^2 Any help is helpful =) thank you.

A 12 kg sled is pulled along at a constant velocity on a horizintal surface by a horizontal force of 11N. How much horizontal force is needed to pull the sled at a constant velocity it two 57 kg girls are sitting in it? How would I go about solving this? Thanks, Amanda

ok, so i got this assignment for the march break and our teacher hit us with this weird question. You are pushing horizontally on a 3.0kg block of wood, pressing it against the wall. if the coefficient of friction between the block and the wall is μ = 0.60, how much force must you exert on...

Just a quick question which i don't seem to get the right answer for. "A parent holds a small child in a swing so that the angle of the swing support is at 20 degrees to the vertical.The child's weight is 200N and the swing seat weighs 50N.What horizontal force must the parent apply" I...

I've been trying to solve the following statics problem dealing with suspension bridges: Let d1=span length from tower to shore, let d2=mid-bridge span length (tower to tower). The main cable makes an angle of 24 degrees below horizontal to the top of the support tower on the d2 side and 30...

A 26.5 kg chandelier hangs from a ceiling on a vertical 4.11 m long wire. What horizontal force would be necessary to displace its position 0.100 m to one side? I know that the tension on the wire would be 260 N but I still can't figure out the force need to displace it .100

A block of mass 8.0 kg is on the verge of sliding down a 450 incline. What is the magnitude of the horizontal force F, if the coefficient of static friction between the block and the incline is 0.35? I'm really stuck...appreciate any help. Thanks!

what minimum horizontal force is needed to pull a wheel of radius R and mass M over a step of height H. force is supplied at center of wheel. ?