Reference no: EM132512935

1) An object is suspended from a spring scale in an elevator. The reading of the scale is 200 N when the elevator is at rest. If the balance reading is 190 N, the elevator is moving.

a. down at constant speed.

b. down and increasing in speed.

c. up at constant speed.

d. down and decreasing in speed.

2) A 92.0kg baseball player slides into second base. The coefficient of friction between the player and the ground is 0.61. If the player comes to rest after 1.2s, what was his initial speed? Round to one decimal place and include units.

3) A boy is pushing a 60 kg box along the floor by applying a horizontal force of 150N. The box is accelerating at a rate of 0.5 m/s2. What is the net force on the box? Round to the nearest whole number and include units.