Question

a motor car of 1000kg is moving with uniform velocity of 5m/s its final velocity becomes 25m/s in 4s due to applied force calculate the force

Answer 1

Answer:

5000 N

Explanation:

f = ma

f = 1000 × 5

f = 5000 N

Answer 2

Answer :-

5000N

Explanation :-

Given :

Mass of the vehicle,m = 1000kg

Initial velocity of the vehicle,u = 5m/s

Final velocity of the vechile,v = 25m/s

Time taken,t = 4s

To Find :

Force,f = ?

Solution :

We know,

$\sf{}\sf{}f=ma$

We don acceleration,so let’s find out the acceleration first.

According to Newton’s first law of equation,

$\sf{}v=u+at$

$\sf{}\implies 25m/s=5m/s+a\times4s$

$\sf{}\implies 25m/s-5m/s=a\times4s$

$\sf{}\implies 20m/s=a\times4s$

$\sf{}\implies\dfrac{20m/s}{4s}=a$

$\sf{}\therefore a= 5m/s^2$

Therefore,force:

$\sf{}\implies Force=mass\times acceleration$

$\sf{}\implies 1000kg \times 5m/s^2$

$\sf{}\therefore 5000N$

Hence,force is equal to 5000N