Question

A metal sphere of mass 12 kg has the same diameter as another sphere of mass 4 kg. Both spheres are dropped simultaneously from a tower. When they are 8 m above the ground, they have the same ____.
(Neglect air resistance.) 

A)Kinetic energy 
B)Potential energy 
C)Momentum 
D)Acceleration

Answer 1

D is the answer because acceleration is g(gravity) same for both the masses ..

Answer 2

Answer:

When both the metal sphere  are 8 m above the ground, they have the same Acceleration.

Explanation:

• The metal sphere of mass 12 kg and the sphere of mass 4 kg have different masses. But both will fall under the acceleration due to gravity g=9.8m/s2 .
• In a free fall, the acceleration does not depend on the mass of an object.

• The value of gravitational force 'g' depends upon the height and the depth on the earth surface. It is also depends upon the latitudinal position on earth.
• According to the given problem both spheres are dropped simultaneously from a tower so there height and latitudinal position on earth are same.
• Hence, both the metal sphere will have same Acceleration.