Question

A bus is moving on a straight road with a speed of 126 km per hour is brought to rest after 200m. Calculate retardation of the bus

Answer 1

given initial velocity = 126km/h
=126 x 5/18
=35m/s
final velocity=0m/s
distance=200m
$v {}^{2} - u {}^{2} = 2as$
${0}^{2} - {35}^{2} = 2a \: \times 200$
$( - 35 {})^{2} = 400a$
$(35 \times 35) \div 400 = a$
a=3.0625m/s²

Answer 2

Answer:

U=126km/h

Explanation: