A trolley and a sandbag have a combined mass of 4 kg. A bullet with a mass of 150 g is fired towards the trolley and is lodged in the sandbag. Immediately after the collision, the trolley and sandbag in combination with the bullet move backwards at 5,3 m·s-1. Calculate the kinetic energy of the trolley, with the sandbag and bullet, directly after the collision. *

The trolleys have magnets on top so they stick together after the collision. Trolley A is moving at 3m/s towards B, which is stationary. A 4 kg 3 m/s 2 kg What is the speed of A and B after collision? What is the change of kinetic energy?

Physical science please simplify   A bullet with a mass of 24 g is fired at an enemy soldier at 750 m/s. After traveling 450 m, the bullet has lost 26% of its velocity to air resistance. How much kinetic energy has the bullet lost?

Kinetic Energy of Three Bowling Balls Kinetic Ball Mass Speed energy A 4.0 kg O m/s O J В 4.0 kg 8.0 m/s 130 J C 5.0 kg 8.0 m/s 160 J 3. Based on the table above, which statement regarding kinetic energy is true? sc.7.P.11.2 The kinetic energy of an object is calculated by multiplying mass times speed. The objects at rest will have more kinetic energy than the objects in motion. C Objects that have the same mass have the same kinetic energy no matter how fast the object moves. When objects travel at the same speed, the more massive object has more kinetic energy. D

1. The pitcher throws the 0.145 kg baseball towards the catcher at 42 m/s. (a) How much kinetic energy does the baseball have? (b) How much work does the catcher's mitt do on the ball during the catch? (c) If the catcher's mitt recoils 12 cm during the catch, how much force did the ball exert on the catcher?

A 80. kg hockey goalie is standing with his skates straight ahead, so there is no friction between his skates and the ice.  In Play A, he catches a 0.20 kg hockey puck moving at 40. m/sec.  In Play B, he catches a 8.0 kg medicine ball moving in the same direction at 1.0 m/sec.  In which case is the goalie pushed back faster?  Explain your reasoning, or show supporting work.

A 4 kg block moving right at 6 m/s collides elastically with a 2 kg block moving right at 3 m/s. Calculate the final kinetic energy. What is the velocity of a 10 kg object move if an average power of 120 watts is used and the applied force is parallel to the surface? 1.22 m/s 12.2 m/s 0.82 m/s 102 m/s 82 m/s

1. The sledder shown in figure starts from the top of a frictionless hill (Point A) with an initial speed of 30 m/s and slides down into the valley. What is the final speed at the top of the next hill (Point B)? 30 m/s A 100 m 130 m O 30 m/s We cannot solve this problem without knowing the mass of the sledder. O 17.7 m/s O 12.5 m/s O 23.8 m/s

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A musket ball, 0.2 kilograms, is shot with the speed of 313 meters per second into a metal can holding some clay.  The musket ball penetrates 0.134 meters into the clay before coming to a stop. What is the kinetic energy of the musket ball before it hits the clay? How much work does the clay do in stopping the musket ball, question mark? What forces the clay exert in stopping the musket ball?