Question # 1-What is the magnitude of the momentum of a particle of mass 2 kg with a speed of 5 m/s?
a)2.5 kg m/s
b)10 kg m/s
c)3 kg m/s
d)7 kg m/s
Question # 2-If two objects with different masses collide and bounce off each other, the one with the greater mass?
a)feels a larger impulse than the other one.
b)feels a smaller impulse than the other one.
c)feels the same impulse as the other one.
d)depends on the time of the collision.
Question # 3:If a particle doubles its speed ?
a)the mass must cut in half to conservere momentum
b)the momentum doubles for constant mass
c)the momentum cuts in half for constant mass
d)none of the above
b)10 kg m/s
c)feels the same impulse as the other one. b)the momentum doubles for constant mass
To answer these questions, we need to understand the concepts of momentum and impulse.
1) The magnitude of momentum is given by the equation p = mv, where p is the momentum, m is the mass, and v is the velocity. In this case, the mass is 2 kg and the speed is 5 m/s. Therefore, the momentum is calculated as follows:
p = (2 kg) * (5 m/s) = 10 kg m/s
So, the correct answer is option b) 10 kg m/s.
2) When two objects with different masses collide and bounce off each other, the one with the greater mass feels a smaller impulse than the other one. Impulse is the change in momentum, and according to Newton's third law, the magnitude of the impulse experienced by both objects is the same. However, since impulse is equal to the change in momentum, a smaller change in momentum is experienced by the object with greater mass due to its larger inertia.
So, the correct answer is option b) feels a smaller impulse than the other one.
3) If a particle doubles its speed, the momentum doubles for constant mass. Momentum is directly proportional to velocity. Increasing the velocity by a factor of 2 will result in the momentum also increasing by a factor of 2. There is no relation between mass and speed changes in this scenario.
So, the correct answer is option b) the momentum doubles for constant mass.