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 11 of 71
- A. The rider is pushed backward by the air resistance
- B. The rider becomes suddenly afraid due to the horse's movement
- C. Inertia of rest keeps the rider's upper body stationary while the lower body moves with the horse
- D. None of the above
Explanation: When the horse starts running suddenly, the rider's body is subject to the law of inertia, which states that an object at rest will remain…
Correct answer: Inertia of rest keeps the rider's upper body stationary while the lower body moves with the horse202. Displacement is
- A. Dimension
- B. Scalar
- C. Vector
- D. Speed
Explanation: Displacement is defined as a vector quantity because it considers both the magnitude and direction of an object's change in position from…
Correct answer: Vector- A. Velocity becomes constant
- B. Average velocity becomes greater
- C. Acceleration decreases
- D. Velocity decreases
Explanation: In a displacement-time graph, the slope or gradient of the tangent line represents the velocity.
Correct answer: Average velocity becomes greater- A. One dyne
- B. One Newton
- C. 10 Kg
- D. 10 dyne
Explanation: According to Newton's Second Law of Motion, force is calculated as the product of mass and acceleration (F = ma).
Correct answer: One Newton205. The value of μk is
- A. Equal to μs
- B. Less than μs
- C. Less and equal to μs
- D. Greater than μs
Explanation: The coefficient of kinetic friction (μk) is generally less than the coefficient of static friction (μs) because it usually requires more…
Correct answer: Less than μs- A. It moves with constant velocity
- B. Zero velocity
- C. Its velocity starts decreasing
- D. Its speed starts decreasing
Explanation: The correct answer is that the spaceship moves with a constant velocity.
Correct answer: It moves with constant velocity- A. mμ
- B. μmg2
- C. μmg
- D. μm2
Explanation: The correct answer isμmg. The frictional force (f) on a flat surface is calculated using the formula f = μN, where μ is the coefficient of…
Correct answer: μmg- A. zero velocity
- B. zero acceleration
- C. A & B
- D. None of these
Explanation: The correct answer is zero acceleration. When a body's speed is constant, its velocity remains unchanged, meaning there is no…
Correct answer: zero acceleration- A. Speed
- B. Torque
- C. Displacement
- D. Velocity
Explanation: Average velocity is defined as the total displacement divided by the total time taken.
Correct answer: Displacement- A. Motion in one dimension
- B. Motion in two dimensions
- C. Motion in three dimensions
- D. None of these
Explanation: The correct answer is 'Motion in one dimension' because motion along a line only requires a single coordinate to describe its position.
Correct answer: Motion in one dimension- A. Force
- B. Velocity
- C. Inertia
- D. All of them
Explanation: The correct answer is Inertia. Mass is a measure of an object's inertia, which is its tendency to resist changes to its motion.
Correct answer: Inertia- A. 128 N
- B. 0.392 N
- C. 128 dynes
- D. 39 N
Explanation: To find the weight of the stone, we use the formula Weight = mass × gravitational acceleration.
Correct answer: 0.392 N- A. 16000
- B. 200
- C. 100
- D. 7000
Explanation: To find the momentum, we first calculate the velocity of the object at the end of 8 seconds using the formula: velocity = initial velocity…
Correct answer: 16000- A. 9.8 N
- B. 98 N
- C. 980 N
- D. 70 N
Explanation: To find the force, we use the formula F = m * a, where F is the force, m is the mass, and a is the acceleration.
Correct answer: 9.8 N- A. 3.27 m / sec2
- B. 19.6 m / sec2
- C. 4.9 m / sec2
- D. 170 m / sec2
Explanation: To find the acceleration of the system, first identify the forces acting on the masses.
Correct answer: 3.27 m / sec2- A. Some force acts
- B. Momentum is zero
- C. Momentum is constant
- D. Force changes
Explanation: The correct answer is that the momentum is constant. The rate of change of momentum with respect to time is equal to the force acting on…
Correct answer: Momentum is constant217. When a falling object reaches a speed where the force of ait resistance is equal to its weight it
- A. Is flying
- B. Has reached its terminal velocity
- C. Will begin to slow down
- D. Zero velocity
Explanation: When an object falls through the air, gravity pulls it downward, increasing its speed.
Correct answer: Has reached its terminal velocity- A. Equal to recoil of gun
- B. Less than recoil of gun
- C. Greater than recoil of gun
- D. Anything is possible
Explanation: When a bullet is fired from a gun, the gun and bullet exert equal and opposite forces on each other.
Correct answer: Equal to recoil of gun219. If the values of instantaneous and average velocities are equal, the body is said to be moving with
- A. Uniform acceleration
- B. Uniform speed
- C. Variable velocity
- D. Uniform velocity
Explanation: The correct answer is Uniform velocity. When a body moves with uniform velocity, it means that both its speed and direction are constant…
Correct answer: Uniform velocity- A. Different for different heights
- B. Different for different bodies
- C. The same
- D. Variable
Explanation: The correct answer is that the acceleration of bodies of different masses allowed to fall freely is the same.
Correct answer: The same