4. A 40 N force is applied to a 10 kg block, but the object only accelerates at 2 m/s? Explain why this happens using a free-body diagram.

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Agirl throws a ball. if the ball's acceleration is 12 m/sec/sec and its mass is 0.5 kg, how much force did the girl apply to the ball?