Question

A car is running at a uniform rate of 40km/h. The driver applies brakes and stops the car within 10m. What is the nature of work done by force of brakes?

Answer 1

Answer:

THE NATURE OF WORK DONE BY FORCE OF BARKES ARE NEGATIVE BECAUSE IT IS ACCELERATING IN THE OPPOSITE DIRECTION. THIS TYPE OF ACCELERATION IS CALLED RETARDATION OR DEACCELERATION.

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Answer 2

Answer:

according to question:

a car running in constant speed  is 40km/h

and the driver applies  brakes  and stop  the car  within 10 min

so formula of work done applies in equation

:- work done = force × displacement

so force is 40 km/h, and displacement covered to applies the brake is 10 min

so put in formula of work done

work done= 40×10

400 n answer......

i hope you will understand  my answer

Explanation: