A 7.80-g bullet moving at 520 m/s penetrates a tree trunk to a depth of 6.30 cm. Answer parts a-b.

A soccer ball of 4.40925 (2 kilosg) pounds moves to the right a speed of 0.5 m/s.  Hits a 0.1102311 (0.05 kilosg) pounds tennis ball initially moving to the left at 2 m/s.  The collision is elastic and takes place in one dimension, along the x axis. What is the approximate final speed of the tennis ball, vf,g?

4. A 7.00-g bullet, when fired from a gun into a 1.00-kg block of wood held in a vise, penetrates the block to a depth of 8.00 cm. This block of wood is next placed on a frictionless horizontal surface, and a second 7.00-g bullet is fired from the gun into the block. To what depth will the bullet penetrate the block in this case?

A 300 gg bird flying along at 6.2 m/sm/s sees a 8.0 gg insect heading straight toward it with a speed of 34 m/sm/s (as measured by an observer on the ground, not by the bird). The bird opens its mouth wide and enjoys a nice lunch. What is the bird's speed immediately after swallowing? Express your answer to two significant figures and include the appropriate units.

A 25 gram bullet is fired at 124 m/s into a 5.00 Kg block, the bullet penetrates the block and exits at 99 m/s. what is the speed of the block after the bullet goes thru it?

Bob and Tom take a sled weighing 10 N to a frozen pond. The sled is initially at rest on the ice. Bob who weighs 490 N runs at 2 metres per second and jumps on the sled. A few seconds later, Tom who weighs 540N runs at 4 metres per second and jumps on the sled with Bob. Keep all values to 3 decimal places. A)What is the velocity of the sled after Bob jumps on to it? B)What is the velocity of the sled after Tom jumps on it?

A 10 g bullet moving at 1,000 m/s goes through a 1.0 kg block. If the bullet goes through the block and comes out at a velocity of 711 m/s, determine the maximum height the block rises to. Use g = 10 N/kg.

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NASA's Saturn V rockets that launched astronauts to the moon were powered by the strongest rocket engine ever developed, providing 6.77 x 10° N of thrust while burning fuel at a rate of 2.63 x 103 kg/s. Calculate the engine's exhaust speed (in m/s). HINT m/s Need Help?

1. a bullet of mass = 5.00 g = 0.005 kg v = 300 m/s b 50.0 kg at 9.00 m/s c mass = 1.00 x 10³ kg moving at 20.0 m/s Find the kinetic energies. Ans. a. 225 J b. 2.02 x 10³ J c. 2.00 x 105 J