2d kinematics Definition and 87 Threads

An astronaut in his space suit can throw a ball a maximum distance dmax = 14 m on the surface of the earth. a) For a given speed of the ball, what angle to the horizontal q (in degrees) will yield the greatest range? q = 45 OK b) If the ball is thrown at this same angle q, what speed...

Homework Statement A tennis ball is thrown from ground level with velocity vo directed sin 30 above the horizontal. If it takes the ball 1.0s to reach the top of its trajectory, what is the magnitude of the initial velocity? Homework Equations The initial vertical component of...

Homework Statement Hi, I'm in a calculus base physics course in college so i thought this forum would be appropriate to post this question. The question is as follows: "A cannonball leaves the end of the cannon with an initial velocity of 67 m/s. Assuming a level terrain, at what angle(s)...

Homework Statement A diver springs upward from a board that is 3 meters above the water. At the instant she contacts the water her speed is 9.30 m/s and her body makes an angle of 84.0º with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude and...

Homework Statement Hi, I'm having trouble conceptualizing how to draw a Velocity(Or position)-Time Graph where more than One dimension is covered. We haven't really covered this in class, but its giving me trouble. The concept is: Acceleration is negative when changing direction(This was...

Question 1: A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H of 32.0 m above sea level, directed at an angle above the horizontal with an unknown speed v0. The projectile remains in flight for 6.00 seconds and...

Homework Statement A moderate wind accelerates a pebble over a horizontal xy plane with a constant acceleration = (4.60 m/s2) + (7.00 m/s2). At time t = 0, the velocity is (4.4 m/s). What are magnitude and angle of its velocity when it has been displaced by 11.5 m parallel to the x axis...

Homework Statement A mortar elevated to 60 degrees scores a hit 15 m up a building 30 m away. With what speed was the shell fired? I know I have to find the launch velocity, or VL. Here is a quick sketch i did: Homework Equations s= vot + 1/2at2 v = s/t The Attempt at a...

Homework Statement An arrow is shot with an initial velocity, V0, at an angle, \Theta, with respect to the horizontal. It reaches a maximum height of 2m above the launch point before hitting its target. The target is 15m horizontally, and 1m below the launch point. Find the time in the air...

Homework Statement A stone thrown horizontally from a height of 6.02m hits the ground at a distance of 13.90m. Calculate the initial speed of the stone. Neglect air resistance. Homework Equations 1. v = v0 + at 2. x = x0 + (1/2)(v0+v)t 3. x = x0 + v0t + (1/2)at^2 4. v^2 = v0^2 +...

Homework Statement 3. A cannon ball is launched from a cliff with an initial velocity of 50 m/s 300 above the horizontal. If it’s range is 300 m. a)What is the height of the cliff? b) What is the impact velocity of the ball right before it strikes the ground? Homework Equations...

Homework Statement A cannonball is fired from the ground at an angle of 50 degrees. The ball lands 67 meters from where it was fired. Air resistance is negligible. How long was the ball in the air? With what velocity was the cannonball fired? Homework Equations Xf=.5at2+Vot+Xo...

Homework Statement A softball is hit over a third baseman's head with some speed v-sub0 at an angle theta above the horizontal. Immediately after the ball is hit, the third baseman turns around and begins to run at a constant velocity V = 7.00m/s. He catches the ball t=2.00sec later at the...

Homework Statement A long jumper leaves the ground at an angle of 23 degrees and travels through the air for a horizontal distance of 8.7m before landing. What is the takeoff speed of the jumper? Homework Equations Trigonometric functions ? The Attempt at a Solution Recently...

[b]1. A delivery truck travels 10 km north, 18 km east, and 29 km south. a) What is its final displacement in km from the origin. b) What is the angle in degree of the final displacement relative to the east. [b]2. I used the pythagorean theorem to obtain the final displacement from the...

A projectile is fired straight upward at 135 m/s. How fast is it moving at the instant it reaches the top of its trajectory? My answer: 0 m/s Suppose instead it were fired upward at 35°. What would be its speed at the top of its trajectory? m/s I do not know how to approach...

Homework Statement A stuntman is jumping from building A to building B. His flight lasts 1s. He leaves point A with a speed of Vo at an angle of 30 degrees above horizontal. Building B is .9m shorter than building A. What horizontal distance was covered by the stuntman given he makes it to the...

Homework Statement A stuntman is jumping from building A to building B. His flight lasts 1s. He leaves point A with a speed of Vo at an angle of 30 degrees above horizontal. Building B is .9m shorter than building A. What horizontal distance was covered by the stuntman given he makes it to the...

Homework Statement A particle starts from rest at (r0) = 9m j-hat and moves in the xy-plane with the velocity shown in the figure . The particle passes through a wire hoop located at (r1)=20m i-hat, then continues onward...

Homework Statement You are designing a missile defense system that will shoot down incoming missiles that pass over a perimeter defense post. The set-up is shown below. An incoming missile passes directly above the defense base. Radar at the base can measure the height, h, and speed, v1, of...

Homework Statement A sniper barrel is exactly one meter above the ground and perfectly horizontal. 1000m away is a target one meter above the ground. if the bullet leaves the gun with a muzzle velocity of 1500m/s will it reach the target? (no, next part is my problem) at what angle should the...

Homework Statement A golf ball is chipped with an initial velocity of 20 m/s along a level fairway. a) WHat angle should the initial velocity make with the horizontal for the maximum height to be equal to the horizontal distance on the fly? b) What is this horizontal distance...

Note: I figured this out. See my follow-up. Thanks. Homework Statement Two tall buildings of equal height stand with vertical walls 40m apart. A stone is thrown from the top of one at an angle of 25 degrees below the horizontal and directly at the other building with a velocity of 18 m/s...

Homework Statement Question 1 [Correctly Solved] A pedestrian moves 2.1km east and then 20km north. Find the magnitude of the resultant displacement vector. Answer in units of km. Answer = 20.1km Question 2 What is the direction of the displacement vector (using the counter-clockwise...

Urgent!HELP!A problem on 2D kinematics Homework Statement A flock of Canada geese directly fly above Kingston is flying due north at a speed of 25km/hr. A second flock directly above Gananoque, 30km to the east of Kingston, is flying in a northwesterly direction at the same speed. Assume...

Homework Statement An owl accidentally drops a mouse it was carrying while flying horizontally at a speed of 5 m/s. The mouse drops to the ground 10m below. What is the mouse's impact velocity? Give the answer as a magnitude and clearly defined angle. As of right now I'm not even sure how...

2D Kinematics, airplanes crashing wtf?? An airplane is flying with a velocity of 240 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When the altitude of the plane is 2.4 km, a flare is released from the plane. The flare hits the target on the ground. What is the angle...

2D Kinematics Please Help! I tried so hard Relative to the ground, a car has a velocity of 17.3 m/s, directed due north. Relative to this car, a truck has a velocity of 20.5 m/s directed 48.5 ° south of east. Find the (a) magnitude and (b) direction of the truck's velocity relative to the...

[SOLVED] 2D Kinematics Help Basically I want to make sure that I have worked this correctly and find out what I did wrong in Part 3, as my solution is not logical. Problem Consider a ball thrown up from the ground. It passes a window in the time interval .251s. The distance across the window...

Here's another variable problem Homework Statement An extreme sportsman jumps from one cliff to another of width (w) by leaping horizontally by vo. With a height difference of h (where the starting cliff is higher) what is vo so he doesn't miss the cliff? (also, what is the direction of...

Homework Statement A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H of 33.0 m above sea level, directed at an angle θ above the horizontal with an unknown speed v0 The projectile remains in flight for...

Homework Statement A sailboat is sailing north with a speed of 12m/s. A wind begins to blow and 72s later the boat's velocity is 18 m/s, 25 degrees north of west. What is the magnitude and direction of the boat's average acceleration during this interval? What is the magnitude and direction...

Homework Statement A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 55.9° above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 29.5 m away. The rocket attains its launch speed in a negligibly short period of time, after which its...

Why isn't this working! 2D Kinematics Here is the problem: Relative to the ground, a car has a velocity of 18.2 m/s, directed due north. Relative to this car, a truck has a velocity of 22.9 m/s directed 47.2 ° south of east. Find the (a) magnitude and (b) direction of the truck's velocity...

?: A rocket is fired up at 5 m/s^2. After a certain time, the engine fails and the rocket goes into freefall. It hits the ground 12 seconds after engine failing. Find V(final) and height that the rocket reaches. the the way down... Vf = Vi - at set Vf = 0 b/c when it hits the ground, V =...

Hey Guys (sorry about other post in diff topic i never saw this one) Here is the physics problem I am having problems with. 1)A .50 kg ball is thrown at 42 degrees above the horizontal at 19 m/s from a stationary hot air baloon 25m above the ground. What is the range? ps Any general...

Here's a problem that I just can't seem to get. I just need to get started out. A placekicker is about to kick a field goal. The ball is 26.9 m from the goalpost. The ball is kicked w/ a initial velocity of 19.8 m/s at an angle theta above the ground. Between what two angles, theta1 &...