Question

an iron sphere of mass 20 kg has a same diameter as an aluminium sphere of mass 12 kg. both spheres are dropped from the tower of same height when they are 10 metres above the ground they have a same ( neglect air resistance ) 1. acceleration 2. velocity. 3. kinetic energy. 4. both 1 & 2​

Answer 1

Answnmer:both12

acceleration due to gravity is same and since air resistance is neglected their velocity will be same

Answer 2

Answer:

4. both 1 and 2

Explanation:

The masses of the two bodies are different.

Remember the equations of motion v=u+at, s=ut+1/2at^2 and $v^{2} -u^{2} =2as$

In these equation there are no mass terms. So velocity and acceleration produce does not depend on mass.

Also note during free fall acceleration of a body is equal to the acceleration due to the gravity.

Hence velocity and acceleration of a body is same during free fall at 10 meter.

But the kinetic energy is not same at 10 meter because kinetic energy depends on mass.