Question

A)A 2.9 kg block of wood sits on a table. A 0.0035 kg bullet, fired horizontally at a speed of 440 m/s, goes completely through the block, emerging at a speed of 140 m/s.What is the speed of the block immediately after the bullet exits?
Answer in m/s

B)A small, 0.43 kg cart is moving at 1.4 m/s on an air track when it collides with a larger, 5 kg cart at rest. After the collision, the small cart recoils in the opposite direction at 0.77 m/s. What is the speed of the large cart after the collision?
Answer in m/s

C) A 0.315 kg bird flying along at 6.5 m/s sees a 0.019 kg insect heading straight toward it with a speed of 23 m/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 the insect?
Answer in m/s

D) A 2.6 kg block slides along a frictionless surface at 1 m/s. A second block, sliding at a faster 5.9 m/s, collides with the first from behind and sticks to it. The final velocity of the combined blocks is 2.9 m/s. What was the mass of the second block?
Answer in kg

Answer 1