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 16 of 71
- A. Straight line
- B. Parabola
- C. Hyperbola
- D. Not a parabola
Explanation: This option aligns with the real scenario. When a projectile faces a strong air current, the combined effect of air resistance and gravity…
Correct answer: Not a parabola- A. React against rocket and push it up
- B. Push against the air
- C. Push against the Earth
- D. Heat up the air which lifts the rocket
Explanation: This option correctly reflects Newton's third law of motion. The high-velocity gases expelled downward from the rocket engine exert an…
Correct answer: React against rocket and push it up- A. 1N
- B. 10N
- C. 100N
- D. None
Explanation: Given:- Velocity of water (v) = 10 m/s- Discharge rate (Q) = 0.0001 m³/sCalculating Momentum:Momentum (p) is given by the formula…
Correct answer: 1N- A. Force
- B. Impulse
- C. Velocity
- D. Both A and C
Explanation: Newton's second law states that force (F) is equal to the rate of change of momentum. Mathematically, F = dp/dt.
Correct answer: Force- A. Due to their shape
- B. Due to air resistance
- C. Due to the angle of projection
- D. All of these
Explanation: This option suggests that imprecision in ballistic missiles can be influenced by a combination of factors-shape, air resistance, and angle…
Correct answer: All of these- A. 55 yards left and 90 yards
- B. 50 yards left and 95 yards
- C. 55 yards left and 95 yards
- D. 45 yards left and 95 yards
Explanation: The coach's positions and the time taken between each position are:A to B: 10 minutes, moving from 0 yards to 10 yards (rightward, so…
Correct answer: 50 yards left and 95 yards- A. The horizontal component of the projectile's acceleration is zero.
- B. The horizontal component of the projectile's velocity is zero.
- C. The kinetic energy of the projectile is zero.
- D. The momentum of the projectile is zero.
Explanation: At the highest point of its trajectory, the projectile's vertical velocity becomes zero, meaning there's no change in the vertical…
Correct answer: The horizontal component of the projectile's acceleration is zero.- A. R30 = R60
- B. R30 = 2R60
- C. 2R30 = R60
- D. R30 = R60 if initial velocities are the same
Explanation: R= v2sin(2θ) / gThe following is the solution to this question.
Correct answer: R30 = R60- A. parabola
- B. straight line
- C. circle
- D. hyperbola
Explanation: When a particle moves with uniform velocity, its displacement-time graph is a straight line.
Correct answer: straight line- A. 2π
- B. π
- C. π/2
- D. π/4
Explanation: Along a semicircle, the distance traveled is equal to the circumference of the semicircle (πr) while the displacement is equal to the…
Correct answer: π/2- A. speed
- B. acceleration
- C. velocity
- D. position vector
Explanation: When a particle moves with uniform velocity, its speed, acceleration, and velocity remain constant.
Correct answer: position vector- A. 3:1
- B. √3:1
- C. 1:3
- D. 1:3^1/2
Explanation: The slope of the displacement-time graph represents velocity. The tangent of the angle of inclination of the line gives the ratio of the…
Correct answer: 3:1- A. 5 m/s
- B. 15 m/s
- C. 10 m/s
- D. 20 m/s
Explanation: The horizontal range of a projectile is given by R = (v^2 * sin(2θ)) / g, where v is the initial velocity, θ is the angle of projection…
Correct answer: 10 m/s- A. always less than one
- B. always equal to one
- C. always more than one
- D. equal to or less than one
Explanation: Average velocity considers both magnitude and direction, while average speed considers only magnitude.
Correct answer: equal to or less than one- A. mass
- B. energy
- C. momentum
- D. angular momentum
Explanation: Rockets work on the principle of conservation of momentum. According to Newton's third law of motion, for every action, there is an equal…
Correct answer: momentum- A. two times
- B. 3 times
- C. four times
- D. remains
Explanation: Kinetic energy is directly proportional to the square of momentum. If momentum is increased by two times, the kinetic energy will increase…
Correct answer: four times- A. 0
- B. 2R
- C. R
- D. 3πR
Explanation: Here's the reasoning:Displacement: In circular motion, the displacement refers to the straight-line distance between the starting and…
Correct answer: 3πR- A. 125
- B. 50
- C. 250
- D. 225
Explanation: The distance fallen by a freely falling body is given by the formula d=1/2 gt^2, where g is the acceleration due to gravity and t is the…
Correct answer: 225- A. 3:2(b) 3:1
- B. 3:1//incorrect
- C. 1:3
- D. none
Explanation: The slope of a velocity-time graph represents acceleration. The tangent of the angle of inclination gives the ratio of accelerations.
Correct answer: 3:1//incorrect- A. velocity
- B. momentum
- C. acceleration
- D. kinetic energy
Explanation: According to Newton's second law, F=ma, if a constant force is applied to a body, it will accelerate at a constant rate in the direction…
Correct answer: acceleration