Question

A car of mas 1000kg moving with a speed of 10m/s increases its speed to 70m/s in a time of 10 seconds. Calculate
1)the acceleration
2)the amount of work done by the engine using the energy concept

Answer 1

Answer:

v =70m/s

u = 10m/s

m= 1000kg

t = 10sec

a = (v-u)/t

a = (70-10)/10

a = 60/10

a = 6m/ sec^2

energy req. = 1/2 x m x (v-u)^2

energy = 1/2 x 10 x 60^2

energy = 18000joule

hope it helps

mark as brainliest.