Weightlessness occurs when an object is in:
a) Static equilibrium
b) Free fall
c) Circular motion
d) Rest
Why do astronauts feel weightless in space?
a) There is no gravity in space
b) They are in continuous free fall
c) They are outside Earth’s gravitational field
d) Their mass becomes zero
What happens to an object in free fall?
a) It moves at constant velocity
b) It accelerates due to gravity
c) It moves in a circular path
d) It stops moving after a while
The acceleration of an object in free fall near Earth’s surface is approximately:
a) 9.8 m/s²
b) 5.6 m/s²
c) 12.4 m/s²
d) 3.2 m/s²
A skydiver in free fall before opening the parachute experiences:
a) Increasing weight
b) Decreasing weight
c) Apparent weightlessness
d) No acceleration
When a person is in an elevator moving downward in free fall, their apparent weight is:
a) Zero
b) More than actual weight
c) Less than actual weight
d) Equal to actual weight
Which of the following is a real-life example of free fall?
a) A car moving on a road
b) A satellite orbiting the Earth
c) A ball dropped from a height
d) A person walking
Weightlessness can be experienced in:
a) A moving train
b) A freely falling elevator
c) A stationary airplane
d) A floating boat
If an astronaut drops a ball inside a spacecraft orbiting Earth, it will:
a) Fall to the floor
b) Move upward
c) Remain floating
d) Move sideways
What force acts on an object in free fall?
a) Only air resistance
b) Only gravity
c) Gravity and air resistance
d) No force at all
Why does an astronaut inside an orbiting spacecraft float?
a) There is no air pressure
b) Gravity is zero in space
c) The astronaut is in free fall
d) The astronaut has no mass
In the absence of air resistance, all objects in free fall:
a) Fall at different rates
b) Accelerate at the same rate
c) Stop moving after some time
d) Move at a constant speed
What happens to a person’s weight in a freely falling elevator?
a) It increases
b) It becomes zero
c) It remains unchanged
d) It decreases slightly
A spacecraft in orbit around Earth is in:
a) Constant acceleration
b) Zero gravity
c) Free fall
d) A stationary state
The time taken for an object to reach the ground in free fall depends on:
a) Its mass
b) Its initial velocity
c) The gravitational acceleration
d) Both b and c
If two objects of different masses are dropped from the same height in vacuum, they will:
a) Fall at the same rate
b) Fall at different rates
c) The heavier one will fall faster
d) The lighter one will fall faster
An astronaut’s weight on Earth is 700 N. What is their weight in an orbiting spacecraft?
a) 700 N
b) 350 N
c) Zero
d) 1400 N
Which statement about free fall is correct?
a) Free-falling objects experience air resistance
b) Free-falling objects accelerate at 9.8 m/s² on Earth
c) Free-falling objects eventually stop accelerating
d) Free-falling objects move at constant speed
If a spacecraft is moving at a constant velocity in space, its occupants experience:
a) Weightlessness
b) Increased weight
c) Normal weight
d) No motion
Which of the following best describes weightlessness?
a) Absence of mass
b) No gravitational force
c) Free-falling motion
d) No acceleration
A person standing on a scale in a falling elevator would read:
a) More than their actual weight
b) Zero
c) Their normal weight
d) A fluctuating value
In deep space, far from gravitational fields, an astronaut would:
a) Feel heavy
b) Experience normal weight
c) Experience weightlessness
d) Have increased mass
The sensation of weight is caused by:
a) Gravitational force only
b) Support force acting against gravity
c) Mass of an object
d) Motion of an object
If an object is thrown horizontally from a cliff, what will happen?
a) It will move in a straight line
b) It will accelerate downward due to gravity
c) It will stop moving after some time
d) It will rise before falling
The term “zero gravity” actually means:
a) No gravity at all
b) Free-fall conditions
c) Opposing gravity
d) Loss of mass
A free-falling object dropped from a height will:
a) Fall at a constant speed
b) Increase speed as it falls
c) Decrease speed as it falls
d) Stop midway
During a spacewalk, an astronaut outside the spacecraft:
a) Experiences weightlessness
b) Feels heavier
c) Feels lighter but not weightless
d) Cannot move freely
What happens to an object thrown upwards in a vacuum?
a) It stops in mid-air
b) It slows down, stops, and falls back
c) It moves away indefinitely
d) It remains stationary
If Earth’s gravity were suddenly turned off, orbiting satellites would:
a) Continue in a circular orbit
b) Move in a straight line
c) Fall to Earth
d) Stop moving
