Free Force and Motion MCQs with Answers
1,416 Force and 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.
Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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- A. Negative
- B. Zero
- C. Positive
- D. Infinite
Explanation: The acceleration of a train when it starts its motion will always be "positive".a=(v-u)/t Since 'v' (final velocity) would be more than…
Correct answer: Positive- A. change in position of an object from A to B
- B. any distance between two points
- C. longest distance from A to B
- D. longest distance between two points
Explanation: Displacement: The shortest directed distance between two points is known as displacement.A.
Correct answer: change in position of an object from A to B583. Speed is a
- A. Tensor
- B. Vector
- C. Scalar
- D. None of these
Explanation: Option C is correct since speed is a scalar quantity having only a numerical magnitude and possess no direction.Option A is incorrect…
Correct answer: Scalar- A. Velocity
- B. Mass
- C. Momentum
- D. Position
Explanation: Option C is correct since the rate of change of momentum is force given by the formula Force=(mass * velocity)/time.Option A is incorrect…
Correct answer: Momentum- A. Highest
- B. Lowest
- C. Middle
- D. None of these
Explanation: At the highest point of the hill, the gravitational force acting on the rolling object is perpendicular to the surface of the hill.
Correct answer: Highest- A. Area under graph represent displacement
- B. Gradient of the graph is constant
- C. Gradient of the tangent of graph represents acceleration
- D. Gradient of the tangent of graph represents velocity
Explanation: The gradient of the tangent to the curve on a displacement-time graph gives you the instantaneous velocity at that point.
Correct answer: Gradient of the tangent of graph represents velocity- A. kilometer
- B. Meter
- C. Foot
- D. Pound
Explanation: The S.I unit of displacement is meter and FPS unit of displacement is Foot.
Correct answer: Foot- A. Speed is changing
- B. The speed and force are changing
- C. The speed and direction of motion are changing
- D. The direction of motion are changing
Explanation: Option C is correct since acceleration is a vector quantity i.e has a direction and magnitude.
Correct answer: The speed and direction of motion are changing- A. Inertia of motion
- B. Inertia of rest
- C. Inertia of acceleration
- D. Inertia of turning
Explanation: Option A is correct since when the bus stops, the people sitting in it experience a jerk.
Correct answer: Inertia of motion- A. Distance is greater than displacement
- B. Distance is lesser than displacement
- C. Distance is equal to displacement
- D. We cannot answer
Explanation: Distance can either be greater than displacement, or equal to it. However, even if both distance and displacement are not equal, distance…
Correct answer: Distance is greater than displacement591. Centrifugal acceleration of a car moving around in a circle of radius 5 m with 10 m/s velocity is _.
- A. 20 m/s2
- B. 10 m/s2
- C. 6 m/s2
- D. 11 m/s2
Explanation: Correct option:AAs we know by the formula a = v²/r where v is the velocity and r is the radius of the circle.Putting values in the above…
Correct answer: 20 m/s2- A. Zero
- B. Non-zero
- C. Infinite
- D. None of these options are correct
Explanation: Acceleration is defined as rate of change of velocity, in constant velocity no change is occuring in velocity thus, option A is correct.
Correct answer: Zero- A. Accelerating frames
- B. Inertial frames
- C. Both Options A and B are correct
- D. Non-inertial frames
Explanation: Newton's first law of motion is applicable only in inertial frames of reference.
Correct answer: Inertial frames- A. 12 m/s2
- B. 13 m/s2
- C. 9.8 m/s2
- D. 7.6 m/s2
Explanation: For horizontal motion, we assume that air resistance is negligible, so the acceleration due to gravity i.e. 9.8m/s2 remains constant.
Correct answer: 9.8 m/s2- A. Rate of change in speed
- B. Rate of change in velocity
- C. Rate of change in distance
- D. Rate of change in displacement
Explanation: Acceleration is defined as the rate of change of velocity. Hence, Option B is correct.
Correct answer: Rate of change in velocity- A. 2πr
- B. 2r
- C. πr
- D. Zero
Explanation: The net displacement of an object moving in a circle, when it completes a cycle, is zero. Hence, Option D is correct.
Correct answer: Zero- A. Velocity is positive, acceleration is negative
- B. Velocity is negative, acceleration is negative
- C. Velocity is positive, acceleration is zero
- D. Velocity is negative, acceleration is positive
Explanation: An object will only speed up if acceleration and velocity are in the same direction. Hence, Option B is correct.
Correct answer: Velocity is negative, acceleration is negative598. Force is a:
- A. Scalar quantity
- B. Vector quantity
- C. None of these
- D. Tensor
Explanation: A scalar quantity is defined as the quantity that is only defined by magnitude whereas a vector quantity is defined by the magnitude as…
Correct answer: Vector quantity- A. Newton's third law of motion
- B. Newton's first law of motion
- C. Inertial law
- D. Newton's second law of motion
Explanation: Newton's third law of motion states that 'every action has an equal and opposite reaction'.
Correct answer: Newton's third law of motion- A. Newton's second law of motion
- B. Newton's third law of motion
- C. Newton's first law of motion
- D. None of these
Explanation: Newton's second law of motion gives the quantitative value of force i.e.
Correct answer: Newton's second law of motion