Question

Consider what happens at the moment when the block leaves the surface of the globe. Which of the following statements are correct?
- The net acceleration of the block is directed straight down.
- The component of the force of gravity toward the center of the globe is equal to the magnitude of the normal force.
- The force of gravity is the only force acting on the block.

Answer 1

Answer:

Option (3) is correct.

Explanation:

when the block leaves the surface, the normal reaction acting on the block is zero and the acceleration is acceleration due to gravity which acts towards the centre of globe.

So, only the force of gravity acts on the block which acts towrads the centre of the globe.

Option (3) is correct.

Answer 2

Answer:

Statement 1 and 3 are correct.

Explanation:

1. The mass moves  downward, so the net acceleration of the block is straight downward.

2.The mass is sliding through the globe, so only the force of gravity is acting on the mass which pulls it in downward direction. The force of gravity has two components [mg sin∅] and [mg cos∅].