Everyday Science MCQs: Gravitation And Its Uses

Where is the center of gravity in a ball that is the same all around?

1. At the edge of the ball
2. At the top of the ball
3. At the center of the ball
4. At the bottom of the ball

Right Answer: (C) At the center of the ball

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What happens when you balance a flat object at its center of gravity?

1. It falls over quickly.
2. It stays balanced.
3. It becomes heavier.
4. It slides to one side.

Right Answer: (B) It stays balanced.

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Why does a tall, narrow object fall over more easily?

1. It has a high center of gravity.
2. It has no center of gravity.
3. It is too light.
4. It has no base.

Right Answer: (A) It has a high center of gravity.

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How does a spring balance measure weight?

1. By comparing weights on two pans
2. By measuring how much a spring stretches due to gravity
3. By balancing the size of objects
4. By checking the air around the object

Right Answer: (B) By measuring how much a spring stretches due to gravity

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Why does a spring balance show different weights at the equator and the poles?

1. Because the spring is weaker at the equator
2. Because gravity is stronger at the poles than at the equator
3. Because the spring becomes shorter at the poles
4. Because the weight of the object changes

Right Answer: (B) Because gravity is stronger at the poles than at the equator

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What does a spring balance measure?

1. The mass of an object
2. The weight of an object
3. The size of an object
4. The height of an object

Right Answer: (B) The weight of an object

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What happens if the beam of a balance is not straight?

1. It gives the correct weight
2. It doesn’t work properly
3. It measures size instead of weight
4. It works faster

Right Answer: (B) It doesn’t work properly

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What happens to a pendulum if its string is made longer?

1. It swings faster.
2. It swings slower.
3. It stops swinging.
4. It makes more swings per minute.

Right Answer: (B) It swings slower.

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What is the length of a standard pendulum that completes one swing in exactly one second?

1. 30 inches
2. 39 inches
3. 25 inches
4. 50 inches

Right Answer: (B) 39 inches

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What causes tides in the oceans?

1. Winds and rain
2. The mutual attraction between the moon and the Earth
3. The movement of fish in the ocean
4. The Earth’s rotation only

Right Answer: (B) The mutual attraction between the moon and the Earth

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