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 18 of 71
- A. Acceleration
- B. Linear acceleration
- C. Angular acceleration
- D. Direction of motion of the body
Explanation: Torque is a measure of the tendency of a force to rotate an object about an axis.
Correct answer: Angular acceleration- A. Parallel to x axis
- B. Parallel
- C. At an angle of 450 with the x-axis
- D. Along the y-axis
Explanation: If the velocity of a body is uniform, meaning constant, the velocity-time graph is a straight line parallel to the x-axis.
Correct answer: Parallel to x axis343. A couple produces:
- A. Purely linear motion
- B. Purely rotational motion
- C. Linear and rotational motion
- D. No motion
Explanation: A couple is a system of forces with equal magnitude, parallel lines of action, and opposite directions, but not acting along the same…
Correct answer: Purely rotational motion- A. T1 = T2
- B. T2 > T1
- C. T1 > T2
- D. Tension in the string always remains the same.
Explanation: It depends on the centripetal force needed to keep the particle in circular motion and the weight component along the string, both of…
Correct answer: Tension in the string always remains the same.- A. The mass of the projectile
- B. The velocity of the projection
- C. The angle of the projection
- D. The angle and as well as velocity of the projection
Explanation: Correct. The horizontal range depends on the initial velocity of the projectileIn summary, the correct option is **b.
Correct answer: The velocity of the projection- A. Uniform acceleration
- B. Variable acceleration
- C. Uniform velocity
- D. Average velocity
Explanation: Bodies falling freely under the action of gravity experience uniform acceleration due to gravity (\(9.8 \, \text{m/s}^2\)).
Correct answer: Uniform acceleration347. A man throws a ball vertically upward in a compartment of an accelerated train. The ball will fall
- A. In front of him
- B. In his hand
- C. Behind him
- D. Beside him
Explanation: The ball will fall behind the man, relative to the direction of motion of the train, due to the acceleration of the train.
Correct answer: Behind him- A. Vertical component of the velocity of bomber
- B. Forces of gravity
- C. Acceleration of the bomber
- D. Horizontal component of the velocity of bomber
Explanation: The horizontal component of the bomber's velocity causes the bomb to have a horizontal motion relative to the target, leading to a miss if…
Correct answer: Horizontal component of the velocity of bomber- A. Inertia of body
- B. Quantity of motion of body
- C. Acceleration of body
- D. All of these
Explanation: Inertia is the property of an object to resist changes in its state of motion, including its tendency to maintain its current velocity and…
Correct answer: Inertia of body- A. Triplet
- B. Quadrupled
- C. Isolation
- D. Pair
Explanation: This is a fundamental principle in physics known as Newton's Third Law of Motion, which states that for every action, there is an equal…
Correct answer: Pair- A. 6N
- B. 12N
- C. Zero
- D. None of these
Explanation: Since the force is acting along y-axis, it has no projection along the x-axis. So, it has no x-component.
Correct answer: Zero- A. 180
- B. 90
- C. 0
- D. 270
Explanation: Let us say, the two vectors are A and B with magnitudes A and B. According to the situation, A.B = (A)(B)Also, we know that A.B =…
Correct answer: 0- A. 1
- B. 2
- C. 3
- D. Infinite
Explanation: Since there is nowhere written that the components need to be perpendicular, a vector can be resolved into infinite components in space.
Correct answer: Infinite- A. 5 m
- B. 8.66 m
- C. 10 m
- D. 17.32 m
Explanation: Taking |A| = 10m and |B| = 20m, with an angle of 30o between them.We are going to find the projection of A along B (of shorter along…
Correct answer: 8.66 m- A. 25
- B. 17.678
- C. -17.678
- D. -25
Explanation: |A B| = (A)(B)sinθ = (5)(5)(sin45o) = (25)(0.707) = 17.678
Correct answer: 17.678- A. 90
- B. 0
- C. 60
- D. 15
Explanation: C= A+B= A2+B2+2ABcosθ13 = (122+52+2125cosθ)Squaring both sides169=144+25+120cosθcosθ=0θ=0 θ=90o
Correct answer: 90- A. kgms-1
- B. kgms-2
- C. kg
- D. Both a and b
Explanation: In option a the units represented are of momentum and in option b the units are of force both of which are the vector quantities.
Correct answer: Both a and b- A. tan-1(1/5)
- B. 90 + tan-1(1/5)
- C. 180 + tan-1(1/5)
- D. 270 - tan-1(1/5)
Explanation: If both components of a vector are negative, then the vector resides in the third quadrant of Cartesian Coordinate System.
Correct answer: 270 - tan-1(1/5)- A. 2
- B. 4
- C. 6
- D. 8
Explanation: The dot product of two vectors is calculated by multiplying their corresponding components and then adding those products together.So, for…
Correct answer: 6- A. tan-1(1/3) vertical towards north
- B. tan-1(1/3) vertical towards south
- C. cos-1(1/3) vertical towards north
- D. cos-1(1/3) vertical towards south
Explanation: The direction of the rain is determined by the vector sum of the rain's vertical velocity and the wind's horizontal velocity.Given:The…
Correct answer: tan-1(1/3) vertical towards north