Question

Q5 A car hits a boy with 1000N with speed of 20m/s.What is the mass of the car?​

Answer 1

Given,

Initial velocity(u)=20ms  

−1

 

Final velocity(v)=0

Distance moved(S)=50m

We know,

v  

2

=u  

2

+2aS

0=20  

2

+2a×50

−400=100a

a=  

100

−400

​  

 

a=−4ms  

−2

 

Now,

F=ma

F=1000×−4

=−4000N