Momentum of an object

         

A 69 kg69\text{ kg} stuntman jumps out of a window and lands on a trampoline 5 m5\text{ m} below. What is the magnitude of his momentum at the point he hits the trampoline?

Assumptions

  • The air resistance is negligible
  • The gravitational acceleration is g=10 m/s2.g=10\text{ m/s}^2.

An object of mass 4 kg4\text{ kg} is thrown straight upward into the air at a velocity of 15 m/s15\text{ m/s} from the edge of a cliff. Let p1p_1 be the momentum of the object 11 second after the throw, and p4p_{4} the momentum of the object 44 seconds after the throw. Then what is p4p1?\displaystyle{\frac{p_{4}}{p_1}}?

Assume that gravitational acceleration is g=10 m/s2.g=10\text{ m/s}^2.

Two objects AA and BB are moving on the ground in the same direction at 5 m/s5\text{ m/s} and 2 m/s,2\text{ m/s}, respectively. Their respective masses are 3 kg3\text{ kg} and 4 kg.4\text{ kg}. Now, they both start to accelerate uniformly at 3 m/s2-3\text{ m/s}^2 and 0.5 m/s2,0.5\text{ m/s}^2, respectively, at the same time. Four seconds after that, what is the sum of their linear momenta?

A 1 kg1\text{ kg} ball is rolling on the floor at 4 m/s.4\text{ m/s}. Find the momentum of the ball.

An object initially at rest falls freely in an atmosphere free of air resistance. After tt seconds, the kinetic energy of the object is x Jx\text{ J} and the momentum of the object is y kgm/s.y\text{ kg}\cdot{m/s}. If x=y,x=y, what is the value of t?t?

Assume that gravitational acceleration is g=10 m/s2.g=10\text{ m/s}^2.

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