Question

A car travelling at 80.0 km/h comes to a screeching halt in a time of 4.00n seconds. Calculate force of friction experienced by the car

Answer 1

Answer:

taking equation v=u+at

where v is 0

u is 80kmhr= 200÷9m/s

t is 4sec

putting in equation

0=200/9+4a

a=-50/9

here - shows that it is retarding

friction force= Mass ×a

now it can be calculated.