Physics Test #5 – Gravitation

1. Newton’s law of gravitation states that every object attracts every other object with a force:
a) That depends on the square of masses b) Proportional to product of masses and inversely proportional to the square of distance c) Proportional to volume d) Constant in all situations

2. What is the value of G (Universal Gravitational Constant)?
a) 9.8 m/s² b) 6.67 × 10⁻¹¹ Nm²/kg² c) 10 m/s² d) 3×10⁸ m/s

3. Acceleration due to gravity on Earth is:
a) 6.67 × 10⁻¹¹ m/s² b) 9.8 m/s² c) 9.8 N/kg d) 1.6 m/s²

4. What is the force of gravity on a 10 kg object near Earth’s surface?
a) 9.8 N b) 0.98 N c) 98 N d) 980 N

5. Mass is measured in kg. Weight is measured in:
a) kg b) Newton c) J d) N/kg

6. An object is floating in water. Which force acts upward on it?
a) Gravity b) Friction c) Buoyant force d) Pressure

7. Archimedes’ Principle is used to find:
a) Mass b) Volume of unstable objects c) Buoyant force d) Friction

8. What will happen to gravity if distance between two masses becomes double?
a) Doubles b) Becomes half c) Becomes 1/4th d) No change

9. Pressure is defined as:
a) Force b) Area c) Force × Area d) Force / Area

10. An object will float if its density is:
a) More than water b) Less than water c) Equal to water d) Very high

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