1. Find the angle 00 at which the block first starts to move. 2. Suppose that the plank is lifted to an angle 0 > 0o (where the mass will definitely slide) and the mass is released from rest at time to = 0. Find its acceleration a down the incline. 3. Finally, find the time tf that the mass reaches the lower end of the plank.

1. Find the angle 00 at which the block first starts to move. 2. Suppose that the plank is lifted to an angle 0 > 0o (where the mass will definitely slide) and the mass is released from rest at time to = 0. Find its acceleration a down the incline. 3. Finally, find the time tf that the mass reaches the lower end of the plank.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter2: Kinematics

Section: Chapter Questions

Problem 30PE: A fireworks shell is accelerated from rest to a velocity of 65.0 m/s over a distance of 0.250 m. (a)...

See similar textbooks

Similar questions

The brakes are applied to a moving van, causing it to uniformly slow down. While slowing, it moves a distance of 40.0 m in 7.30 s to a final velocity of 1.20 m/s, at which point the brakes are released. (a) What was its initial speed (in m/s), just before the brakes were applied? m/s (b) What was its acceleration (in m/s2) while the brakes were applied? (Assume the initial direction of motion is the positive direction. Indicate the direction with the sign of your answer.)
A 1100 kg car accelerates at 3.40 m/s2. If the car accelerates from rest for 30 seconds, what is the resulting velocity?
Q13. An airplane starts at rest at the end of a runway. If it reaches a speed of 80 m/s in 18 s, what is the plane's acceleration?
. As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. (a) What is the baseball’s acceleration in m/s and in Ws? (b) What is the size of the force acting on it?
An ice sled powered by a rocket engine sum from rest on a large frozen lake and accelerates at + 40 ft/s2. After some time t1, the rocket engine is shut down and the sled moves with constant velocity v for a time t2. If the total distance traveled by the sled is 17 500 ft and the total time is 90 s. find (a) the times t1 and t2 and (b) the velocity v. At the 17 500-ft mark, the sled begins to accelerate at 20 ft/s2. (c) What is the final position of the sled when it comes to rest? (d) How long does it take to come to rest?
A fireworks shell is accelerated from rest to a velocity of 65.0 m/s over a distance of 0.250 m. (a) How long did the acceleration last? (b) Calculate the acceleration.
(a) Give an example of different net external forces acting on the same system to produce different accelerations. (b) Give an example of the same net external force acting on systems of different masses, producing different accelerations. (c) What law accurately describes both effects? State it in words and as an equation.
An unwary football player collides with a padded goalpost while running at a velocity of 7.50 m/s and comes to a full stop after compressing the padding and his body 0.350 m. (a) What is his deceleration? (b) How long does the collision last?
A net force ___. (3.1) (a) can produce motion (b) is a scalar quantity (c) is capable of producing a change in velocity (d) both (a) and (c)
Describe the path of a moving body in the event that (a) its acceleration is constant in magnitude at all times and perpendicular to the velocity, and (b) its acceleration is constant in magnitude al all times and parallel to the velocity.
(i) Why the value of acceleration is always positive regardless of the direction of the block motion? (ii) Why the value of velocity is negative when the block moves up the incline and positive when the block moves down the incline?
A ball is thrown vertically upward from the ground with an initial velocity of 39.2 m/sec. If the only force considered is that attributed to the acceleration due to gravity, find(i) how long will it take for the ball to strike the ground? (i) how long will it take for the ball to strike the ground? (iii) how high the ball will rise?