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At a certain time a particle had a speed of 55 m/s in the positive x direction, and 8.7 s later its speed was 78 m/s in the opposite direction. What was the average acceleration of the particle through this 8.7 s interval?
A 1.5 solid sphere (radius = 0.20 ) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.50 high and 5.7 long. what is its rotational kinetic energy
An 75.0 spacewalking astronaut pushes off a 640 satellite, exerting a 80.0 force for the 0.440 it takes him to straighten his arms. How far apart are the astronaut and the satellite after 1.5 min.
A tennis player receives a volley with the ball (0.0600 kg) traveling horizontally at 54.0 m/s, What is the impulse delivered to the ball by the racquet
A converging lens with a focal length of 5.00 cm is placed 20.00 cm in front of a concave mirror whose focal length is also 5.00cm. Calculate the position of the final image formed by the system
A 5.00g bullet is fired horizontally into a 1.30kgwooden block resting on a horizontal surface. What was the initial speed of the bullet
A uniformly charged rod of length L and total charge Q lies along the x axis as shown in Figure P23.36. (a) Find the components of the electric field at the point P on the y axis a distance d from the origin. (b) What are the approximate values of th..
question1a stable nucleus is composed of z protons and n neutrons. is the mass of nucleus identical to the sum of the
A 1000kg car traveling at a speed of 40m/s skids to a halt on wet concrete where the friction force is 6000N
Two particles with masses 2m and 5m are moving toward each other along the x axis with the same initial speeds vi. Find the final speeds of the two particles in terms of vi. particle 2m
A 42 kg pole vaulter running at 11 m/s vaults over the bar. Her speed while she is above the bar is 0.7 m/s. Avoid air resistance, as well as any energy absorbed by pole, and determine her altitude as she crosses the bar.
A bicyclist is coasting down a hill with a slope of 8 deg into a head wind of 5 m/sec (measured relative to the ground). The bicycle + rider mass is 80 kg and the coefficient of rolling friction is 0.02. Assuming that the frontal area is about 0.5 m2..
mass-spring system can oscillate with simple harmonic motion because a compressed or stretched spring has which kind of energy.
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