15,000 N of force must be applied to stop the car in 3 seconds .
What do you mean by force of an object ?
Force is the push or pull on an object with mass that causes it to change velocity (to accelerate). Force represents as a vector, which means it has both magnitude and direction.
A force is usually denoted by the symbol F. It is represented by the following -
Force=Mass× Acceleration
where F = force, m = mass, and a = acceleration.
The SI unit of force is the Newton (N).
To calculate force -
Given,
Mass=1500 kg , velocity=30 m/s , t=30 sec
Since,
Acceleration =velocity/time
Acceleration =30/3
Acceleration =10 m/s
We know,
Force=mass × acceleration
Force=1500× 10
Force=15,000 N
Hence, the force of 15,000 N must be applied to stop the car in 3 seconds .
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