Two spheres of the same size, one of mass 5 kg and the other of mass 50 g are dropped simultaneously from a tower. When they are about to touch the ground, they have the same:
Correct answer: D. Acceleration
- A. Kinetic Energy
- B. Potential Energy
- C. Momentum
- D. Acceleration
- E. All given options are correct
Explanation
When the two spheres are about to touch the ground, they will have the same acceleration due to gravity. The acceleration due to gravity near the surface of the Earth is approximately 9.8 m/s^2. It is the same for all objects regardless of their mass (assuming negligible air resistance). Since both spheres are dropped simultaneously, they experience the same gravitational force acting on them. According to Newton's second law of motion (F = m*a), the force acting on an object is equal to its mass multiplied by its acceleration. As both spheres experience the same gravitational force and have the same acceleration due to gravity, their masses do not affect their speed when they are about to touch the ground. Thus, they will have the same velocity or speed when they are about to touch the ground.
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