الزخم - كمية الحركة

Impulse and Momentum

Impulse and Momentum

قوانين الزخم
الفلاتر
المقالات في الفئة الزخم - كمية الحركة
الاسم
A 70.0-kg stuntman free-falls from a building for 2.5 s and hits an airbag. The airbag exerts a force on him over a time period of 2.0 s, and he comes to a complete stop. What was the approximate magnitude of the average force exerted by the airbag?
A 2000-kg airplane flies at 343 m/s. What is its momentum?
A 140-kg fullback is running with the football at 10 m/s. A 70-kg defender runs at him in the opposite direction at 5 m/s. The defender wraps his arms around the fullback. What is the velocity of the two players after the collision?
A barbell consists of a uniform rod with a mass attached to each end. The rod is 2.2 m long and has a moment of inertia about its center of mass of 1.5 kg.m^2. The center of each 3.0-kg mass is attached to the end of the rod. Calculate the rotational mome
A 260-g cue ball moving at 1.0 m/s strikes a 150-g numbered ball at rest. The collision is elastic and the cue ball stops. What is the speed of the numbered ball?
At a carnival, one of the booths has a shooting gallery with spring-loaded guns that fire 12-g suction-cup darts with a muzzle velocity of2.5 m/s. The 95-g targets are 25 cm tall and hinged at the bottom and may bemodeled as a plank pinned at one end (I=1
A cue ball with a mass of 250 g travels at 1.0 m/s and hits a numbered ball with a mass of 170 g at rest. The numbered ball moves off at an angle of 45°, while the cue ball moves off at an angle of -45°. At what speeds do the balls move?
A 1.0 Kg object, A, with a velocity of 4.0m/s to the right, strikes a second object, B, of mass 3.0Kg, originally at rest. In the collision, A is deflected from its original direction through an angle of 50 degrees; its speed after the collision is 2.0m/s
All four forces are exerted on the stick that is initially at rest. What is the angular momentum of the stick after 2 s
Consider the collision shown to the right. M1 is moving to the right at 12 m/s. M2, that has one-sixth of the mass of M1, is moving to the left at 3.4 m/s. How fast will M2 be moving after the collision? (Assume the table is frictionless)