Question

calculate the time required by a car to excert 400n when it moves from rest to 20m/s and its mass is 200kg​

Answer 1

Answer:

first we will calculate the force

F=ma

400=200× a

a=400/200

a=2m/s²

to calculate the time

v=u+at

20=0+2×t

20=2t

t=20/2

t=10

hope it helps....