Question

A car is moving with a velocity of 16m/s when beakrs are applied. the force applied by the brake is 1000n .the mass of the car alogn with its passengers is 1200kg how long should the brakes be applied ​

Answer 1

in this question,

initial velocity is 16 m/s

final velocity is 0 m/s

As you know ,

F=MA (here force is 1000N and mass is 1200kg and decelleration is X )

or, 1000 = 1200* X

or, X =1000/1200

or, X= 0.83333.... m/ s Square

so, using 1st law of motion ,

v=u+at

0= 16 +(- 0.83)* t

or, - 16= -0.83t

or, t= -16/83 *100

or, time=19.6 second.

Answer 2

Answer:

initial velocity is 16 m/s

final velocity is 0 m/s

As you know ,

F=MA (here force is 1000N and mass is 1200kg and decelleration is X )

or, 1000 = 1200* X

or, X =1000/1200

or, X= 0.83333.... m/ s Square

so, using 1st law of motion ,

v=u+at

0= 16 +(- 0.83)* t

or, - 16= -0.83t

or, t= -16/83 *100

or, time=19.6 second. ........please vote and like

Explanation: