Author Question: A 4.00-kg block rests on a 30.0 incline as shown in the figure. If the coefficient of static ... (Read 89 times)

Yi-Chen · **on:** Jul 29, 2018

A 4.00-kg block rests on a 30.0 incline as shown in the figure. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline?

A) 34.0 N
B) 51.1 N
C) 54.7 N
D) 84.0 N
E) 76.4 N

Question 2

A 6.0 kg box slides down an inclined plane that makes an angle of 39 with the horizontal. If the coefficient of kinetic friction is 0.19, at what rate does the box accelerate down the slope?

A) 4.7 m/s2
B) 5.2 m/s2
C) 5.5 m/s2
D) 6.2 m/s2