Question

a racer start a car race from rest and finishes with a velocity of 36 km per hour assuming constant acceleration of 5 metre per second square find the time it will take to finish the race​

Answer 1

Answer:

2 seconds

Explanation:

it is given in the question that the object has started from rest so,

intial velocity(u) = 0 m/s

final velocity (v) = 36 km /h

since s.i unit of speed is m/s so we have to change the final velocity to .m/s so,

36×5/18=10m/s

acceleration (a) = 5m/s^2

v = u + at

10 = 0 + 5t

10 = 5t

10/5 = t

2 = t

so, time = 2 seconds