A motorcar is moving with a velocity of 108 km/h and it
takes 4 s to stop after the brakes are applied. Calculate the
force exerted by the brakes on the motorcar
Answers
Correct Question :-
A motor car is moving with a velocity of 108km/h and it takes 4 sec to stop after the brakes are applied . calculate the force exerted by the brakes on the motor car if its mass along with passenger is 1000 kg .
Given :-
A motor car is moving with the velocity
of 108km/h .
It takes 4 seconds to stop after brakes applied .
Solution :-
As we know ,
Acceleration = v - u / t
Here , initial velocity is 108 * 5/18
( convert it into meters that is why we multiply 5/18 with 108 )
final velocity = 0
Time = 4 seconds
Put the value in the required formula .
Acceleration = 0 - 108 * 5/18 / 4
Acceleration = - 7.5m/s^2
Force = Mass * Acceleration
Force = 1000 * - 7.5
Force = -7500 N
Correct Question :-
A motor car is moving with a velocity of 108km/h and it takes 4 sec to stop after the brakes are applied . calculate the force exerted by the brakes on the motor car if its mass along with passenger is 1000 kg .
Given :-
A motor car is moving with the velocity
of 108km/h .
It takes 4 seconds to stop after brakes applied .
Solution :-
As we know ,
Acceleration = v - u / t
Here , initial velocity is 108 × 5/18
( convert it into meters that is why we multiply 5/18 with 108 )
final velocity = 0
Time = 4 seconds
Put the value in the required formula .
Acceleration = 0 - 108 × 5/18 / 4
Acceleration = - 7.5m/s²
Force = Mass × Acceleration
Force = 1000 × - 7.5
Force = -7500 N