2. A football player kicks a ball with a force of 50N. Find the impulse on the ball if his foot stays in contact with the football for 0.01s.
a
3.A hockey player applies an average force of 80N to a 0.25kg hockey puck for a time of 0.2s.
Determine the impulse experienced by the hockey puck.

you should know

where f is an average force.

First Question

i = 50N ×0.01s = 0.5 N•s

Second Question

i = 80N ×0.2s = 16N•s

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.