الزخم - كمية الحركة

Impulse and Momentum

قوانين الزخم

المقالات في الفئة الزخم - كمية الحركة
الاسم
A marksman fires a 7.5-g bullet from a loosely held 1.2-kg handgun. The bullet travels away at +365 m/s. At what velocity does the handgun recoil?
A person applies an impulse of 5.0 kg∙m/s to a box in order to set it in motion. If the person is in contact with the box for 0.25 s, what is the average force exerted by the person on the box?
Two skaters, a 70-kg man and a 50-kg woman, are initially at rest on an ice rink and then "push off" from each other and move in opposite directions. After the push-off, the woman moves with a velocity of +2.5 m/s. What is the velocity of the man?
A dog of mass 10 kg sits on a skateboard of mass 2 kg that is initially traveling south at 2 m/s. The dog jumps off with a velocity of 1 m/s north rela-tive to the ground. Which of the following is the best estimate of the velocity of the skateboard immed
A 1000-kg cannon fires a 15-kg cannonball. The cannon is mounted on a low-friction carriage that allows it to recoil at -1.5 m/s. What is the speed of the cannonball?
Two balls of equal mass collide in a perfectly elastic collision. Ball A moves to the right at 10 m/s. Ball B moves to the left at 5 m/s. After the collision, Ball B moves to the right at 3 m/s. What is the velocity of Ball A after the collision?
A 1.0-kg ball moving at + 10 m/s strikes a wall and bounces back. The collision is perfectly elastic. What is the balls momentum after the collision? (Assume a frictionless surface.)
Two 500-g carts move on a frictionless air track. Cart A is moving at +0.1 m/s when it collides into Cart Bat rest. The two carts get stuck together. At what velocity will the combined carts move?
A 750-kg aircraft is flying level at 100 m/s. A tailwind blows for 2 min, and the aircrafts speed increases to 120 m/s. What was the average force of the tailwind?
Two railroad cars (2 X 10^4 kg each) are traveling in the same direction along a railroad track. Car A is traveling at 14 m/s, and Car B is traveling at 10 m/s. When Car A catches up with Car B, the two cars link together. What is the velocity of

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