Question

Noddy falls from some height in
H20 and
at the
bottom of H2O
at time = t seconds ane ustops.
Draw his velocity-time graph​

Answer 1

Answer:

Let a body of mass  

′

m  

′

 placed at a height  

′

h  

′

 above the ground, start falling down from rest.`

When the body falls from a height h to h/2, the potential energy is given as  

2

mgh

​

.

The body covers the distance h/2 with a velocity v. We make use of the third equation of motion to obtain velocity of the body.

v  

2

−u  

2

=2aS

Here, u=0,a=g and S=x

v  

2

−0=  

2

2gh

​

,thatisv  

2

=gh

Kinetic energy =  

2

1

​

mv  

2

 

That is, K.E=  

2

mgh

​

 

Hence, at height h/2 the energy possessed is half potential energy and half the kinetic energy.

Explanation: