Question

study the given figure and calculate the work done by the external force on the body

a)4500N
b)40N
c)4000N
d)400N​

Answer 1

Answer:

4000 J

Explanation:

WORK=FORCE× DISPLACEMENT

WE NEED TO BOTH FORCE AND DISPLACEMENT

FORCE=Ma

BY USING v=u+at

40=0+a×5

a=40/5

a=8 m/s²

FORCE = Ma

=5×8

=40 N

DISPLACEMENT=?

BY USING v²-u²=2as

40²-0²=2×8×s

1600=16×s

s=1600/16

s=100 m

WORK=F×s

=40×100

=4000 J

THE UNIT OF WORK IS NOT NEWTON(N) IT IS JOULES (J).

Answer 2

Answer:

4000N

Explanation:

i hope that's useful for you