Free Newton's Laws of Motion MCQs with Answers
83 Newton's Laws of Motion MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Newton’s laws explain inertia, the relation between net force and acceleration, and action-reaction pairs. Questions involve free-body diagrams, balanced and unbalanced forces, F = ma, force as the rate of change of momentum, and identifying genuine third-law pairs, which act on different bodies.
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- A. 588 N
- B. 294 N
- C. 58.8 N
- D. 882 N
Explanation: To find the apparent weight, we subtract the force due to acceleration (\(ma\)) from the actual weight (\(mg\)).
Correct answer: 294 N- A. Double
- B. Half
- C. Negative
- D. 0
Explanation: When the jet plane dives down with an acceleration of 9.8m/s^2, the apparent weight of the pilot decreases to half due to the opposing…
Correct answer: Half- A. Centipetal force
- B. Gravitational force
- C. Centrifugal force
- D. All the above
Explanation: Option C is correct.A car is moving with high velocity when it has a turn .
Correct answer: Centrifugal force- A. 4N
- B. 400N
- C. 40N
- D. 4000N
Explanation: The explanation is as follows To calculate the centripetal force acting on a car of mass 1000kg moving with speed 72km/h in a circular…
Correct answer: 4000N- A. 12m/s
- B. 20m/s
- C. 17m/s
- D. None
Explanation: Here is the explanation of the correct optionvi = 0a = F/m=16i + 12j|a| = 20m/s2(Vf)2 = (vi)2 +2as= 0 + 2(20)(4)vf = √160 or 12.43
Correct answer: 12m/s- A. Static equilibrium.
- B. Stable equilibrium.
- C. Unstable equilibrium.
- D. Dynamic equilibrium.
Explanation: Dynamic equilibrium occurs when an object is moving at a constant velocity (zero acceleration) and the net force acting on it is zero.
Correct answer: Dynamic equilibrium.- A. - 1 N.
- B. 0 N.
- C. 1⁄2 N.
- D. 1 N.
Explanation: An object is in equilibrium when the net force acting upon it is 0 N. This means that all the forces cancel each other out, resulting in…
Correct answer: 0 N.- A. The object will accelerate in the opposite direction.
- B. The object will remain stationary.
- C. The object's speed will increase.
- D. The object will continue moving in the same direction.
Explanation: When a force is applied to an object, it causes the object to accelerate in the direction of the force.
Correct answer: The object will accelerate in the opposite direction.- A. Is always at rest.
- B. Has zero acceleration.
- C. Moves with uniform velocity.
- D. Moves with some acceleration.
Explanation: A non-inertial frame of reference is one that experiences acceleration.
Correct answer: Moves with some acceleration.- A. 2nd law of motion
- B. 3rd law of motion
- C. 1st law of motion
- D. Law of gravity
Explanation: Newton's third law states that every force has an equal and opposite force Since the force of the ball equals , the force of the racket…
Correct answer: 3rd law of motion- A. Force acting upon it
- B. Acceleration
- C. Velocity
- D. Torque acting upon it
Explanation: A moving object is in equilibrium if it moves with a constant velocity; then its acceleration is zero.
Correct answer: Velocity- A. Centrifugal force
- B. Gravitational force
- C. Coulumbs force
- D. Frictional force
Explanation: An object moving in circular motion around a copper track has centripetal force provided by the force of friction acting upon it.
Correct answer: Frictional force- A. Inertia
- B. Acceleration
- C. Gravitational force
- D. Tension
Explanation: The explanation for this question will be added soon.
Correct answer: Tension- A. Action and reaction have same nature
- B. Action and reaction have same line of action
- C. Action and reaction never act on same body
- D. Action and reaction can cancel each other
Explanation: Either force can be considered the action force or the reaction force. You might think that because action-reaction forces are equal and…
Correct answer: Action and reaction can cancel each other- A. Pseudo force pushes backwards
- B. Pseudo force pushes forwards
- C. Real force pushes backwards
- D. Real force pushes forwards
Explanation: The nonexistent force that is felt pushing one forward when a car breaks only exists within a non-inertial frame of reference.
Correct answer: Pseudo force pushes forwards- A. Real force
- B. Friction force
- C. Pseudo force
- D. None of these options is correct
Explanation: The centrifugal force is a pseudo-force because if the centripetal force ceased for an object in circular motion, the centrifugal force…
Correct answer: Pseudo force- A. The resultant force acts towards the centre of the circle
- B. There is no resultant force
- C. The resultant force acts away from the centre of the circle
- D. None of these
Explanation: If a moving object has no forces acting on it, it will continue to move in a straight line at constant velocity.
Correct answer: The resultant force acts towards the centre of the circle- A. Rest frame
- B. Accelerating frame
- C. Non-inertial frame
- D. All of these
Explanation: A rest frame associated to a particle will be inertial if the particle is free, i.e. it does not interact with anything.
Correct answer: Rest frame- A. Rest frame
- B. Accelerating frame
- C. Non-inertial frame
- D. All of these options are correct
Explanation: Both the frames of reference i.e. a rest frame, and a frame moving with a constant velocity can be considered as Inertial Frames of…
Correct answer: Rest frame- A. Galileo theory
- B. Aristotle theory
- C. Einstein's theory
- D. Maxwell's theory
Explanation: Aristotle's Law of Motion: The natural state for an object is to be at rest.
Correct answer: Aristotle theory