Question

IF bus is travelling with the velocity of 60 km per hour applying the brakes suddenly it is retarded 0.5 metre per second square how far will it travel before coming to rest

Answer 1

Given

Initial Velocity of bus = 60 km/h

Final Velocity of bus = 0 km/h (rest)

Since retardation is negative acceleration

Acceleration = - 0.5 m/s²

To Find

Distance travelled

Solution

Using Newton's equation of motion

2as = v² - u²

➺ s = (v² - u²)/ 2a

➺ s = (0² - 60²)/ 2 × (-0.5)

➺ s = -3600/ -1

➺ s = 3600 m Or 3.6 km

Answer : 3600m Or 3.6 km