Gravity Effects | MCQs

Explanation

Explanation

The weight of an object at the center of the Earth is the same as its weight on the surface.

This might seem counterintuitive, but it's because the gravitational force acting on the object is proportional to the distance from the center of the Earth.

At the center, the distance is zero, but the gravitational force is also zero because the object is surrounded by equal amounts of mass in all directions.

Explanation

When a projectile moves upward, gravity acts downward.

This opposes the vertical motion, so the vertical component of velocity decreases until it becomes zero at the highest point.

Explanation

The time period T of a simple pendulum is given by: T = 2π√L/g

It depends on length (L) and acceleration due to gravity (g), but is independent of mass.

Explanation

A free-falling object near Earth's surface accelerates at approximately 9.80 m/s² due to gravity.

This is known as the acceleration due to gravity (g).

Explanation

As you move toward the center of the Earth, the gravitational force decreases because mass below you exerts less pull.

Therefore, the weight of a body decreases as gravity weakens.

Explanation

Projectile motion is a type of two-dimensional motion where an object moves under the influence of gravity, with a constant acceleration of g (9.8 m/s²).

It involves a combination of horizontal motion with a constant velocity and vertical motion with a constant acceleration, resulting in a curved trajectory.