A bus is travelling at a speed of 60 km/hour. On seeing a boy 11 m ahead on the road, the driver of the bus applies brakes and the bus stops at a distance of 10 m. What is its
tardation and how long does it take to come at rest?

Decelaration is

Time is 4.3 seconds

Explanation:

Given

--- Initial Velocity

--- Distance to stop

-- Final Velocity

Required

Determine the deceleration (a) and time taken (t)

The deceleration is solved using the following Newton equation of motion

Convert velocity to m/s

becomes

Collect Like Terms

Make a the subject

The negative sign shows deceleration.

Hence, the decelaration is

Solving time (t): Using first law of motion

Substitute values for v, u and a

Collect Like Terms

Solve for t

33: i think it’s b

50 inches should be the resultant vector