14 practice sets · Page 1 of 1
Which of the following has the largest gravitational force?
A 100 kg object on Earth
A 10 kg object on the Moon
A 1 kg object on Earth
A 1000 kg object in space
Correct Answer: A — A 100 kg object on Earth
Explanation:
A 100 kg object on Earth experiences the greatest gravitational force due to Earth's gravity and the large mass.
Which of the following is the SI unit of weight?
Joule
Meter
Kilogram
Newton
Correct Answer: D — Newton
Explanation:
Weight is a force, so its SI unit is the newton.
Why do objects fall towards the Earth?
Due to magnetic force
Due to friction
Due to gravitational force
Due to air resistance
Correct Answer: C — Due to gravitational force
Explanation:
Earth's gravitational force pulls objects toward its center.
Which of the following has the highest value of gravitational acceleration?
Mars
Earth
Jupiter
The Moon
Correct Answer: C — Jupiter
Explanation:
Jupiter has a higher gravitational acceleration than Earth, Mars, or the Moon.
What happens to the gravitational force if the distance between two objects is halved?
It becomes half
It becomes four times
It remains unchanged
It becomes double
Correct Answer: B — It becomes four times
Explanation:
Gravitational force varies inversely with the square of distance.
What is the gravitational force between two objects with masses m₁ and m₂ separated by a distance r?
F = G(m₁ × m₂)/r²
F = G(m₁ + m₂)/r
F = Gm₁m₂ × r²
F = G/r²
Correct Answer: A — F = G(m₁ × m₂)/r²
Explanation:
Newton's law of gravitation is F = G(m₁m₂)/r².
What is the force of attraction between two masses called?
Gravitational force
Electromagnetic force
Frictional force
Nuclear force
Correct Answer: A — Gravitational force
Explanation:
The attractive force between masses is called gravitational force.
What is the force of gravity on an object called?
Gravitational force
Normal force
Weight
Mass
Correct Answer: C — Weight
Explanation:
Weight is the gravitational force acting on an object.
What is the acceleration of an object in free fall near the surface of the Earth?
0 m/s²
9.8 m/s²
1 m/s²
10 m/s²
Correct Answer: B — 9.8 m/s²
Explanation:
Near Earth's surface, free-falling objects accelerate at about 9.8 m/s².
Which of the following objects experiences gravitational force?
Only the Moon
Any object with mass
Only objects near the Earth's surface
Only Earth
Correct Answer: B — Any object with mass
Explanation:
Gravitational force acts between all objects that have mass.
What is the relationship between weight and mass?
Weight is independent of mass
Weight is inversely proportional to mass
Weight is proportional to mass
Weight is proportional to volume
Correct Answer: C — Weight is proportional to mass
Explanation:
Weight increases with mass because weight depends on gravitational force.
Which of the following is true about gravitational force?
It is always attractive
It is a contact force
It depends on the color of the object
It is a non-contact force
Correct Answer: A — It is always attractive
Explanation:
Gravitational force is always attractive between masses.
What is the value of acceleration due to gravity on Earth?
10 m/s²
9.8 m/s
9.8 m/s²
9.8 N/kg
Correct Answer: C — 9.8 m/s²
Explanation:
The acceleration due to gravity on Earth is approximately 9.8 m/s².
Who formulated the law of universal gravitation?
Albert Einstein
Galileo Galilei
Isaac Newton
Johannes Kepler
Correct Answer: C — Isaac Newton
Explanation:
Isaac Newton formulated the law of universal gravitation.
