Question

Calculate the net force acting on the block.
A=5kgwt , B=10N

Answer 1

Force, F=10N

Mass, m=5Kg

Force,

F=ma

a=2m/s  

2

 

Work done, W=F.ds

In first second, displacement,

s=  

2

1

​

at  

2

 

s=  

2

1

​

×2×1

s=1m

So, work done,W=10×1=10J

In second second, s=  

2

1

​

×2×4=4m

So, the displacement is , 4−1=3m

Hence, work done in 2 second is,

W=10×3

W=30J