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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1,416 questions · page 27 of 71
- A. Uniform accelerated motion
- B. Motion with constant velocity
- C. Motion with constant speed
- D. Body at rest
Explanation: A horizontal line on a displacement-time graph shows that the object is stationary (not moving because the displacement doesn't change…
Correct answer: Body at rest- A. Speed
- B. Velocity
- C. Acceleration
- D. Momentum
Explanation: The rate of change of displacement with time is called velocity. The SI Unit of velocity is m/s.
Correct answer: Velocity- A. A horizontal line
- B. A curve line with a decreasing gradient
- C. A straight line with a constant gradient
- D. A curve line with an increasing gradient
Explanation: The gradient of the displacement-time graph is equal to velocity. 'Curved lines' on a displacement-time graph indicate that the velocity…
Correct answer: A curve line with an increasing gradient524. Displacement of an object with respect to a constant moving (v) frame in the same direction is:
- A. x - vt
- B. x + vt
- C. x
- D. x + vt + at2
Explanation: Displacement is the movement of an object that changes its position from its actual place.
Correct answer: x + vt- A. Displacement/time
- B. Distance/time
- C. Distance x time
- D. Displacement x time
Explanation: Average velocity is defined as the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement…
Correct answer: Displacement/time- A. calculating area under the graph
- B. finding gradient of displacement time graph
- C. calculating area above the graph
- D. finding the length of the graph
Explanation: In a displacement-time graph, the slope or gradient of the line is equal to the velocity of the object.
Correct answer: finding gradient of displacement time graph- A. -1 m/s^2
- B. 2m/s^2
- C. 5 m/s^2
- D. 10m/s^2
Explanation: The average acceleration of a car can be calculated using the formula: Average acceleration = (change in velocity) / (time taken) In this…
Correct answer: -1 m/s^2- A. 20 m/s^2
- B. 10 m/s^2
- C. 5 m/s^2
- D. 2m/s^2
Explanation: v = u +at20m/s = 0 + a(10s)a = 20m / 10sa = 2m/s²
Correct answer: 2m/s^2- A. 2*(average velocity)
- B. average velocity
- C. zero
- D. not enough info
Explanation: Explanation As it is along a straight path, the distance travelled by the particle will be equal to the displacement of the particle.
Correct answer: average velocity- A. mv kg m/s
- B. - mv kg's
- C. 2 mv kg's
- D. 0 kg m/s
Explanation: According to the law of conservation of momentum, total initial momentum of a closed system is equal to total final momentum of a closed…
Correct answer: 0 kg m/s- A. r^2d
- B. 2πr
- C. 2r
- D. r
Explanation: The displacement of the Sun with respect to Earth can be described in two different ways: 1.
Correct answer: r- A. A pseudo force pushes backwards
- B. A pseudo force pushes forwards
- C. A real force pushes backwards
- D. A real force pushes forwards
Explanation: A pseudo force (also called a fictitious force, inertial force, or d'Alembert force) is an apparent force that acts on all masses whose…
Correct answer: A pseudo force pushes forwards- A. Restoring force
- B. Inertia
- C. Gravitational potential energy
- D. Elastic potential energy
Explanation: To get oscillations, a body is pulled away from its resting or equilibrium position and then released.
Correct answer: Inertia- A. Rest frame
- B. Accelerating frame
- C. Non-inertial frame
- D. All of these options are correct
Explanation: An object moves at a constant velocity unless acted upon by an external force.
Correct answer: Rest frame- A. Uniform velocity
- B. changing acceleration
- C. Average acceleration
- D. Constant acceleration
Explanation: Since the slope of the velocity time graph represents the acceleration of the body, hence a changing slope of the graph means that the…
Correct answer: changing acceleration- A. Law of inertia
- B. Law of electromagnetism
- C. Law of universal gravity
- D. Law of conservation of momentum
Explanation: The property of a body to remain at rest or to remain in motion with constant velocity is called inertia.
Correct answer: Law of inertia- A. Can be both 'zero' and 'constant but not zero'
- B. Increasing uniformly with respect to time
- C. Zero
- D. Constant but not zero
Explanation: The resultant force and acceleration are directly related to each other via the second law of motion:F = maSince uniform acceleration…
Correct answer: Constant but not zero538. A moving body needs:
- A. Momentum
- B. Kinetic energy
- C. Velocity
- D. Potential energy
Explanation: A moving body needs to have kinetic energy (KE). Because KE = 1/2 mv2 (m = mass, v = speed), the object would need a certain amount of…
Correct answer: Kinetic energy- A. 50
- B. 5
- C. 2
- D. 0.5
Explanation: Acceleration is given by a = Vf - Vi / t Where Vf and Vi are final and initial velocities respectively.
Correct answer: 5- A. Minimum
- B. Zero
- C. Infinity
- D. Maximum
Explanation: The slope of the v-t graph gives acceleration. If the slope is parallel to y-axis i.e.
Correct answer: Infinity