Question

Calculate the work required to stop a car of 1000 kg
moving with a velocity 60 km/hr. And when angle
between them is 0° and 180°.​

Answer 1

Answer:

When a object is moving with a constant velocity, it possess K.E

K.E=

2

1

×m×v

2

So, in order to bring the object to rest i.e its same magnitude of energy is required so, as the final final energy comes to zero.

So, magnitude of work that needs to be done =

2

1

×m×v

2

60km/hr=16.66m/s

So, work required to stop the car =

2

1

×1500×16.66

2

⇒=208166.7J=208.17kJ