a car of mass 100kg travering at 36km/h is brought to rest over a distance of 40m.calculate(a)accelaration(b)the average abreaking force

Answer 1

a. Vo = 36000m/3600s. = 10 m/s.
a = -(Vo^2)/2d = -(10^2)/80 = -1.25 m/s^2.

b. F = M*a = 100 * (-1.25) = -125 N.

The negative sign means the force opposes the motion.

Answer 2

A car of mass 100kg travelling 36kg/hr is brought to rest over a distance 40m. a) the acceleration of the car