A mechanic uses a mechanical lift to raise a car. The car weighs 12,500 N. The lift raises the car 2.25 m in 10 seconds.

How much power was used to accomplish this task?

A.
28.125 W

B.
2812.5 W

C.
5556 W

D.
1.8 x 10-4 W

Question

A mechanic uses a mechanical lift to raise a car. The car weighs 12,500 N. The lift raises the car 2.25 m in 10 seconds. 
 
How much power was used to accomplish this task?
 
 A.
28.125 W
 
 B.
2812.5 W
 
 C.
5556 W
 
 D.
1.8 x 10-4 W

anonymous · Answer

Work = (force x distance) = 12,500 x 2.25 = 28,125 Joules. 
Power = (28,125/10s) = 2,812.5 Watts.

anonymous · Answer

can you help me with my question
Which statement about biochemical reactions is true?
a) some energy is changed to matter in a biochemical reaction
b) there is no net gain or loss of energy in a biochemical reaction
c) the total amount of energy is reduced during a reaction
d) the total amount of energy is increased during a reaction

anonymous · Answer

D i think