A 56 g particle is moving to the left at 25 m/s . How much net work must be done on the particle to cause it to move to the right at 31 m/s

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c