physics : class11 Gravitational Force near Earth : Gravitational Force : Gravitation MCQ Questions and Answers
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Gravitational Force near Earth
MCQ questions and answers.
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MCQ Questions
1. What is the approximate acceleration due to gravity near the surface of Earth?
A.
9.8 m/s²
B.
98 m/s²
C.
0.98 m/s²
D.
980 m/s²
Correct Answer:
9.8 m/s²
Explanation:
Near Earth's surface, the acceleration due to gravity is approximately 9.8 m/s².
2. What is the direction of the gravitational force exerted by Earth on an object near its surface?
A.
Vertically upward
B.
Horizontally forward
C.
Toward the center of Earth
D.
Away from the center of Earth
Correct Answer:
Toward the center of Earth
Explanation:
Earth attracts objects toward its center, so the gravitational force acts downward, toward the center of Earth.
3. The gravitational force acting on an object near Earth's surface is commonly called its:
A.
Mass
B.
Weight
C.
Density
D.
Volume
Correct Answer:
Weight
Explanation:
The gravitational force exerted by Earth on an object is called the object's weight.
4. Which expression gives the weight of an object near Earth's surface?
A.
W = m/g
B.
W = g/m
C.
W = mg
D.
W = m + g
Correct Answer:
W = mg
Explanation:
Near Earth's surface, weight is calculated as the product of mass and acceleration due to gravity: W = mg.
5. What is the weight of a 2 kg object near Earth's surface, taking g = 9.8 m/s²?
A.
4.9 N
B.
9.8 N
C.
19.6 N
D.
98 N
Correct Answer:
19.6 N
Explanation:
Using W = mg, the weight is 2 kg × 9.8 m/s² = 19.6 N.
6. If the mass of an object is doubled near Earth's surface, its weight will:
A.
Become half
B.
Remain unchanged
C.
Become double
D.
Become four times
Correct Answer:
Become double
Explanation:
Since weight is W = mg and g remains constant near Earth's surface, doubling the mass doubles the weight.
7. What is the SI unit of gravitational force near Earth's surface?
A.
Kilogram
B.
Newton
C.
Meter
D.
Joule
Correct Answer:
Newton
Explanation:
Gravitational force is a force, and its SI unit is the newton.
8. An object is released from rest near Earth's surface, ignoring air resistance. What happens to its speed?
A.
It increases due to Earth's gravitational force
B.
It decreases due to Earth's gravitational force
C.
It remains zero
D.
It changes randomly
Correct Answer:
It increases due to Earth's gravitational force
Explanation:
Earth's gravitational force causes a freely falling object to accelerate downward, increasing its speed.
9. Near Earth's surface, which object experiences the greater gravitational force when both are in the same location?
A.
The object with greater mass
B.
The object with smaller mass
C.
Both always experience equal force
D.
The object with greater volume only
Correct Answer:
The object with greater mass
Explanation:
Near Earth's surface, gravitational force is W = mg. For the same value of g, the object with greater mass experiences greater gravitational force.
10. What is the approximate weight of a 5 kg object near Earth's surface if g = 10 m/s²?
A.
0.5 N
B.
5 N
C.
50 N
D.
500 N
Correct Answer:
50 N
Explanation:
Using W = mg, the weight is 5 kg × 10 m/s² = 50 N.
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