A block kept on a frictionless horizontal surface is acted upon by a force of 100 N, as shown in the figure below. What magnitude of force must be applied on the block from the opposite direction to stop its motion?
0 75 N
0 100 N
O 50N
200 N

What is the primary force that suspension bridges use cables to hold their spans up? a. tension force b. resistance force c. normal force d. elastic force e. applied force

Marcella is a four-year-old girl who is a victim of emotional child abuse. based on the child and family services improvement and innovation act of 2011, which action should the government take for marcella? a. the state should arrest marcella’s abuser. b. the state should find a home for marcella as soon as possible. c. the state should enforce stricter laws in the area where marcella resides. d. the state should provide medical assistance to marcella.

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot