A 3.00-g bullet traveling horizontally at 400 m/s hits a 3.0…
A 3.00-g bullet traveling horizontally at 400 m/s hits a 3.00-kg wooden block, which is initially at rest on a smooth horizontal table. The bullet buries itself in the block without passing through. The speed of the block in m/s, after the collision is:
Read DetailsA ballet dancer spins about a vertical axis at 1 revolution…
A ballet dancer spins about a vertical axis at 1 revolution per second with arm outstretched. With her arms folded, her moment of inertia about the vertical axis decreases by 55 %. Calculate the new rate of revolution in rad/s.
Read DetailsA spring-powered dart gun is un-stretched and has a spring c…
A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m. The spring is compressed by 8.0 cm and a 5.0 gram projectile is placed in the gun. The kinetic energy of the projectile when it is shot from the gun is
Read DetailsA 4.00 kg ball is traveling at 3.00 m/s and strikes a wall….
A 4.00 kg ball is traveling at 3.00 m/s and strikes a wall. The 4.00 kg ball bounces off the wall with a velocity of 4.0 m/s. If the contact with the wall by the ball lasts for 0.10 seconds, then the average force on the ball is
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