Gravitation Test

Result

Gravitation Test - 13

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Question 1
1 / -0

When a ball is dropped from a height, it moves toward Earth. This is because of

A
tension

B
air pressure

C
Earth’sgravity

D
Earth’smagnetic field

Solution

Gravity is the force because of which all objects get attracted toward each other. A ball near Earth’s surface gets attracted by Earth’s gravity. Therefore, a ball dropped from a height moves toward Earth because of Earth’s gravitational force.

The correct answer is C.

Why alternative A is wrong:

Tension is produced when two connected bodies try to move away from each other. Tension cannot bring two objects toward each other.

Why alternative B is wrong:

Atmospheric pressure opposes the downward movement of the ball.

Why alternative D is wrong:

Earth’s magnetic field is not responsible for the downward motion of the ball.
Question 2
1 / -0

Use the following information to answer the next question.

During a baseball game, Andrew hits the ball with great force. The ball flies up in the sky and then starts falling toward the ground.

The ball starts falling toward the ground because of

A
the high speed

B
Earth’s magnetic field

C
theatmospheric pressure

D
Earth’s gravitational pull

Solution

Earth attracts every object near its surface toward it. This force of attraction is called gravity. The ball starts falling toward the ground because of Earth’s gravitational force.

The correct answer is D.

Why alternative A is wrong:

The high speed of the ball has no relation to its downward movement.

Why alternative B is wrong:

The ball used in a baseball game is a non-magnetic material. Hence, Earth’s magnetic field has no effect on its movement.

Why alternative C is wrong:

Atmospheric pressure opposes the downward movement of the ball.