Gravitation is responsible for:
a) The motion of planets around the sun
b) The expansion of gases
c) The conduction of heat
d) The production of sound
Which force keeps the moon in orbit around the Earth?
a) Electromagnetic force
b) Nuclear force
c) Gravitational force
d) Frictional force
Gravitational force between two objects depends on:
a) Their masses and distance between them
b) Their volumes and shape
c) Their charge and temperature
d) Their speed and direction
What would happen if there were no gravity on Earth?
a) Objects would remain stationary
b) Everything would float away
c) The atmosphere would become denser
d) The Earth would stop rotating
The weight of an object is the force due to:
a) Friction
b) Gravity
c) Magnetism
d) Air resistance
The acceleration due to gravity on the Moon is:
a) Equal to Earth’s gravity
b) Greater than Earth’s gravity
c) About one-sixth of Earth’s gravity
d) Twice that of Earth’s gravity
Artificial satellites stay in orbit due to:
a) Magnetic force
b) Nuclear force
c) Centripetal force due to gravity
d) Electrostatic force
Which of the following is an application of gravitation?
a) Airplane lift
b) Satellite motion
c) Electron movement in atoms
d) Sound wave propagation
Geostationary satellites complete one revolution around Earth in:
a) 24 hours
b) 12 hours
c) 6 hours
d) 48 hours
The force of gravity between two objects increases when:
a) Their masses decrease
b) The distance between them increases
c) Their masses increase
d) They move away from each other
Why do astronauts experience weightlessness in space?
a) There is no gravity in space
b) They are beyond Earth’s gravitational pull
c) They are in free fall around the Earth
d) They have no mass in space
Gravitational force is always:
a) Attractive
b) Repulsive
c) Both attractive and repulsive
d) Zero
Which scientist formulated the universal law of gravitation?
a) Albert Einstein
b) Isaac Newton
c) Galileo Galilei
d) Nikola Tesla
Why does a ball fall back to the ground when thrown upward?
a) Air resistance
b) Magnetic force
c) Gravity
d) Centrifugal force
The value of acceleration due to gravity (g) on Earth is approximately:
a) 1.6 m/s²
b) 9.8 m/s²
c) 4.9 m/s²
d) 15.2 m/s²
How does gravity affect ocean tides?
a) It creates atmospheric pressure
b) It pulls water toward the moon and sun
c) It makes water flow uphill
d) It increases the salinity of seawater
If Earth’s mass were doubled, the gravitational force on objects would:
a) Decrease
b) Increase
c) Remain the same
d) Become zero
Which of the following affects the gravitational force between two objects?
a) Their temperature
b) Their masses and distance
c) Their speed
d) Their color
What happens to your weight on the Moon?
a) It increases
b) It decreases
c) It remains the same
d) It becomes zero
Gravitational potential energy depends on:
a) Speed and mass
b) Mass and height
c) Temperature and volume
d) Shape and color
The motion of planets around the sun is due to:
a) Magnetic force
b) Gravity
c) Nuclear force
d) Electrostatic force
Why do satellites not fall to Earth?
a) They have no mass
b) They are moving fast enough to stay in orbit
c) There is no gravity in space
d) They repel Earth’s gravity
Which of the following best explains why we do not feel Earth’s gravity pulling on other people?
a) Gravity does not exist between small objects
b) The force is too small to be noticeable
c) Earth’s gravity cancels it out
d) The distance is too great
A person’s weight is:
a) The same everywhere
b) Greater on the Moon
c) Greater on Earth than on the Moon
d) Independent of gravity
If the distance between two masses is tripled, the gravitational force between them becomes:
a) One-third
b) One-ninth
c) Three times
d) Nine times
Gravitational force is weakest between:
a) Large masses close together
b) Small masses far apart
c) Large masses far apart
d) Small masses close together
Which of these statements about gravitational force is true?
a) It only exists on Earth
b) It acts between all objects with mass
c) It acts only on planets
d) It is stronger than nuclear force
What is the gravitational force on an object with mass 10 kg on Earth?
a) 98 N
b) 9.8 N
c) 100 N
d) 50 N
Why does an apple fall to the ground?
a) It is pushed by the wind
b) Gravity pulls it downward
c) Air pressure forces it down
d) The mass of the apple increases
