Answer:
a) Instantaneous rate at which the force does work on the object = -6 W
b) 
Explanation:
a) Given that

and

Instantaneous rate at which the force does work on the object is called power.
Power is the dot product of force and velocity.

Instantaneous rate at which the force does work on the object = -6 W
b) Here given that 
Power = -12 W


Answer:
The one with the less mass
Explanation:
Wish I could help you you rock
Answer:
Both
Explanation:
The S.I. unit of pressure is newton/meter square or pascal as both represent the same dimensional value.
Answer:
2000years
Explanation:
We will either convert the distance to centimeters or speed to meters/second.
Converting distance to centimeters: 100 meters= 100*100centimeters =10000centimeters.
time=distance/speed
t=10000/5=2000 years