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Consider the following statements about the universal law of gravitation:
1. The gravitational force between two objects is proportional to the product of their masses.
2. The gravitational force between two objects is directly proportional to the distance between them.
3. This law explains the tides caused by the Moon and the Sun.
Which of the statements given above is/are correct?
Consider the following statements about free fall:
1. An object is in free fall when only the gravitational force acts on it.
2. The acceleration due to gravity on Earth is about 9.8 m/\(\text{s}^{2}\).
3. If air resistance is ignored, a heavier object falls faster than a lighter one.
Which of the statements given above is/are correct?
Match List-I with List-II:
| List-I (Physical quantity) | List-II (Unit) |
|---|---|
| A. Mass | 1. Watt |
| B. Weight | 2. Joule |
| C. Power | 3. Kilogram |
| D. Work | 4. Newton |
Select the correct answer using the codes given below.
Consider the following statements about mass and weight:
1. Mass is the quantity of matter in an object and is measured in kilograms.
2. Weight is the product of mass and acceleration due to gravity.
3. The mass of an object on the Moon becomes one-sixth of its mass on Earth.
Which of the statements given above is/are NOT correct?
The SI unit of work, which equals force multiplied by displacement, is named after which scientist?
Which of the following correctly describes the law of conservation of energy?
Which of the following pairs is correctly matched?
One 'unit' of electricity shown on a household bill is equal to how many joules?
Which one of the following is the odd one out?
If the distance between two masses is reduced to half, the gravitational force between them becomes:
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