Newton's First Law of Motion MCQs
Q1. Which of the following is the best definition of Newton's First Law of Motion?
a) An object in motion will stop unless acted upon by a force.
b) An object in motion will continue in motion with the same velocity unless acted upon by an external force.
c) An object will accelerate if a force is applied.
d) An object will always remain at rest.
Correct Answer: b
Q2. What is the term for the tendency of an object to resist changes in its state of motion?
a) Momentum
b) Acceleration
c) Inertia
d) Force
Correct Answer: c
Q3. Which of the following examples demonstrates inertia?
a) A car stopping quickly and the passengers lurching forward.
b) A ball rolling down a hill and speeding up.
c) A rocket accelerating in space.
d) A person pushing a stationary box, and it starts to move.
Correct Answer: a
Q4. According to Newton’s First Law, what will happen to a moving object in space with no external forces acting on it?
a) It will eventually slow down.
b) It will change direction on its own.
c) It will continue moving at a constant speed in a straight line.
d) It will stop after some time.
Correct Answer: c
Q4. If a book is lying on a table and remains at rest, what can be concluded?
a) The book has no inertia.
b) No forces are acting on the book.
c) The forces acting on the book are balanced.
d) The book is under the effect of friction.
Correct Answer: c
Q5. What happens to an object at rest if no external force is applied to it?
a) It will move in the direction of inertia.
b) It will remain at rest.
c) It will accelerate.
d) It will change direction.
Correct Answer: b
Q6. If a spacecraft is moving in space far from any gravitational or frictional forces, which of the following will occur?
a) It will gradually slow down and stop.
b) It will maintain a constant velocity.
c) It will turn in a circle.
d) It will need continuous propulsion to keep moving.
Correct Answer: b
Q7. Which of the following factors affects an object’s inertia?
a) Speed
b) Shape
c) Mass
d) Color
Correct Answer: c