Frictionless surface Definition and 80 Threads

1. Homework Statement Blocks of mass 5, 10, and 25 kg are lined up from left to right in that order on a frictionless surface so each block is touching the next one. A rightward-pointing force of magnitude 14 N is applied to the left-most block. a) What is the magnitude of the force that...

Homework Statement A box of mass 20.00kg placed on a frictionless surface is pulled by two horizontal forces in the plane of the floor, as shown below. Determine the following quantities. a) acceleration vector. b) magnitude of resultant acceleration and its angle with the x-axis...

Homework Statement A plank of length 6m is lying on a smooth horizontal surface and has a mass of 100kg. A 50kg girl walks from one end of the plank to the other. In this experiment, how far will the plank shift and what direction? Why?Homework Equations v_g will mean girl's velocity relative...

17. Two masses are connected by a string and pulled along a frictionless surface by another string one is 5kg and the other is 10 kg to which a tension of 40.0 N is applied. The magnitude of the system’s acceleration is A. 8.0 m/s2 B. 20 m/s2 C. 13 m/s2 D. 2.7 m/s2 (For this question I...

1. The Problem: (Collision with a thin rod -- pinned and unpinned) A small object with mass n and an initial velocity of v sticks to a long thin rod of mass m and length l. The motion takes place on a horizontal frictionless surface. Answer the questions for the situation where a) the rod...

Homework Statement A wooden block with a length of 10 cm and a mass of 1 kg lies on an icy plane. A projectile with mass of 2 g hits the wooden block with velocity of 300 m/s and breaks through its center of gravity. How much are the final velocities of the wooden block and the projectile...

Homework Statement The question I'm working on says "A special, frictionless, thin meter stick is initially standing vertically on the floor. If the meter stick falls over, with what angular velocity will it hit the floor?" Homework Equations v_rot=rw, I=1/12mL^2, KE=1/2Iw^2 The...

Homework Statement In the figure, a crate of mass m = 111 kg is pushed at a constant speed up a frictionless ramp (θ = 30°) by a horizontal force F . The positive direction of an x-axis is up the ramp, and the positive direction of a y-axis is perpendicular to the ramp. (a) What is the...

Homework Statement In the figure, a crate of mass m = 111 kg is pushed at a constant speed up a frictionless ramp (θ = 30°) by a horizontal force F . The positive direction of an x-axis is up the ramp, and the positive direction of a y-axis is perpendicular to the ramp. (a) What is the...

Homework Statement Three blocks on a frictionless horizontal surface are in contact with each other as shown in Fig. 4-5. A force F is applied to block 1 (mass m1). (a) Draw a free-body diagram for eeach block. Determine (b) the acceleration of the system (in terms of m1, m2, m3), (c) the...

Homework Statement Blocks with masses of 0.54 kg, 2.16 kg, and 2.87 kg are lined up in a row on a frictionless table. All three are pushed forward by a 13.8 N force applied to the 1 kg block. How much force does the 2.16 kg block exert on the 2.87 kg block? Homework Equations...

Some of you are familiar with the US FIRST Robotics organization, a program that introduces robotics to high school students. This years game/task involves playing on a surface that is VERY SLIPPERY, intended to effectively simulate "floating" in 1/6th Earth's gravity as if the robot was on the...

A uniform disk is lying on a flat, frictionless surface, and a force is applied as shown: http://www.freeimagehosting.net/uploads/ae622047b5.jpg What will be the motion of the disk.. more importantly, the motion of center of mass of the disk. will it move in a straight line, or will it move...

Homework Statement Two air hocky pucks collide head-on elastically on a frictionless surface. The smaller puck has a mass of 0.050 kg and is moving to the right at 5.0 m/s while the larger puck has a mass of 0.10 kg and is moving to the left with a speed of 2.0 m/s. Find the velocity of each...

Friction on top of object with frictionless surface? Homework Statement If an object1 has friction between it and object2, and object 1 rests on object 2, when a force is appliced to object 1 that is horizontal, what impact will it have on object 2 when the surface object 2 is on has...

1. a 1400 kg car with a cross section of 1.8m wide and 1.46m high slides across a frictionless surface at 19 m/s. The question is how long does it take (in seconds) to get to 13 m/s? the 2nd part is how long it does it take to get to 10 m/s? 2. D = .5(A)v^2 where A is the area of cross...

A 1.6 -long, 550 rope pulls a 9.0 block of ice across a horizontal, frictionless surface. The block accelerates at 1.0 . 1) How much force pulls forward on the block of ice? 2) How much force pulls forward on the rope?

Homework Statement A 100 kg man stands on the left end of a 100 kg board 2 meters long which sits on a frictionless surface as shown. Where will the left end of the board come to rest if the man walks to the right end of the board and stops? http://pics-hosting.com/files/pexpnaxozyl1o2qins.jpg...

..and he brings in his arms to decrease his moment of inertia in order to increase his angular velocity, that means the rotational kinetic energy increases. But that means there's a change in rotational kinetic energy, right? But wouldn't there be no external forces acting on him (assuming no...

Is there anything that stops the formation of a perfectly frictionless surface? There isn't even enough to type to make a second sentence here.

Homework Statement A wedge with mass rests on a frictionless horizontal table top. A block with mass is placed on the wedge. There is no friction between the block and the wedge. The system is released from rest. Homework Equations (-gm)/((M+m)tan(alpha)+(M/tan(alpha))) The...

Hey all. My professor gave us this question in class the other day but I'm having a hell of a time reasoning out how the answer can be true. Firstly, the problem: There's a bucket on wheels moving at a constant velocity on a frictionless surface. It's raining out so the bucket is gaining...

Homework Statement A small cylindrical disk hits a more massive square block directly head on. Both objects slide without friction on a smooth ice surface. The block is pushed forward and the disk bounces back. Which statement is true? a) The block pushes the disk. b) The disk exerts a...

A massive steel cable drags a 20 kg block across a horizontal, frictionless surface. A 100 N force applied to the cable causes the block to reach a speed of 4.0 m/s in a distance of 2.0 m. What is the mass of the cable? I hate to ask you folks for a lot of help. But I have no idea...

Homework Statement Well I figured out the first problem I had posted so here's a new one :) If two objects of different masses are sliding along a frictionless surface at the same speed and they both slide of the same frictionless surface. which rises to a greater height? I want to say they...

Now I'm confused again... What kind of motion does a constant, non-zero force produce on an object of constant mass? a. constant speed b. constant acceleration c. increasing acceleration d.it depends on the speed of the object I know that if there's no friction, the force on the object...

A thin homogeneous rod hsa length L and mass M. Initially the rod is vertical at rest on a frictionless surface. The rod is given a slight push and begins to fall in the gravitational field. 1) write an expression for the kinetic energy T of the rod as functions of M,L,g, theta and d theta/dt...

Im having trouble with this problem. I know that KE=1/2mv^2 and the Wrok engergy theorm W=KFf-KEo but I am having trouble relating the figure to KE. Two boxes are connected to each other as show. The system is released from rest and the 1.00 kg box falls 1.00 m. The surface of the table is...

Is there anything such as a frictionless surface? Why?

Is there any such thing as a frictionless surface?