Answer:
1200J
21.8Watts
Explanation:
Given parameters:
Force = 400N
Distance = 3m
Time = 55s
Unknown:
Work done = ?
Power = ?
Solution:
Work done is the force applied to move a body through a certain distance.
Power is the rate at which work is done
Work done = Force x distance = 400 x 3 = 1200J
Power =
=
= 21.8Watts
Vector it always consists to size(magnitude) and direction
Answer:
3
Explanation:
Applying the formula, we see that the ke gets increased 4 tines.