2. A mover is pushing on a very large box with a force of 850 N, but he can't get it to move. What force is the box exerting on the mover?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.