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 47 of 71
- A. Velocity of a car is increasing on a straight road
- B. Car is turning round a corner
- C. Velocity of a car is decreasing on a straight road
- D. None of these
Explanation: Acceleration is a vector that describes the rate of change of velocity.
Correct answer: Velocity of a car is increasing on a straight road- A. Uniform velocity
- B. Uniform acceleration
- C. Variable velocity
- D. Variable acceleration
Explanation: The correct answer is uniform velocity. When an object moves with uniform velocity, it maintains a constant speed and travels in a…
Correct answer: Uniform velocity- A. Its range will double
- B. Its range will quadruple
- C. Its range will be decreased by a factor of two
- D. Its range will decrease by a factor of four
Explanation: The range of a projectile is given by the formula R = (v02 * sin(2θ)) / g, where v0 is the initial speed, θ is the launch angle, and g is…
Correct answer: Its range will quadruple- A. Acceleration is parallel (or antiparallel) to the velocity.
- B. Acceleration is vertical, while the velocity can be in any direction.
- C. Acceleration is perpendicular to the velocity.
- D. Acceleration is vertical and the velocity is horizontal.
Explanation: In straight line motion, the acceleration vector is either parallel or antiparallel to the velocity vector.
Correct answer: Acceleration is parallel (or antiparallel) to the velocity.- A. Acceleration is parallel (or antiparallel) to the velocity.
- B. Acceleration is vertical, while the velocity can be in any direction.
- C. Acceleration is perpendicular to the velocity.
- D. Acceleration is vertical and the velocity is horizontal.
Explanation: In projectile motion, the only acceleration acting on the object is due to gravity, which acts in the vertical direction.
Correct answer: Acceleration is vertical, while the velocity can be in any direction.- A. 2.0 s
- B. 5.0 s
- C. 4.0 s
- D. 8.0 s
Explanation: The scenario describes a uniformly accelerated motion, starting with an initial velocity (u) of 10 m/s and reaching a final velocity (v)…
Correct answer: 2.0 s927. A particle is moving with a constant speed along straight line path. A force is not required to
- A. Change its direction
- B. Increase its speed
- C. Decrease its momentum
- D. Keep it moving with uniform velocity
Explanation: Newton's first law of motion, also known as the law of inertia, states that an object will remain at rest or move in a straight line at…
Correct answer: Keep it moving with uniform velocity- A. Zero
- B. π/2
- C. π
- D. π/4
Explanation: The relative velocity between two particles is defined as the vector difference of their velocities.
Correct answer: π- A. 24 m
- B. 56 m
- C. 35.3 m
- D. 36.3 m
Explanation: The horizontal distance traveled by a projectile can be calculated using the formula for range: Range = ( Vi2/g ) x sin(2θ), where Vi is…
Correct answer: 35.3 m- A. A
- B. B
- C. C
- D. D
Explanation: It is a case of inelastic collision. So, momentum is conserved, whereas kinetic energy is not.
Correct answer: B- A. 2.5m
- B. 0.8m
- C. 0.9m
- D. 0.45m
Explanation: The correct answer is 0.45 m. The maximum height in projectile motion is determined by the vertical component of the initial velocity (3…
Correct answer: 0.45m- A. 10 ms-1
- B. 29.4 ms-1
- C. 15 ms-1
- D. 12.2 ms-1
Explanation: To determine the initial velocity needed for the cricket ball to reach its maximum height in 3 seconds, we use the kinematic equation vi =…
Correct answer: 29.4 ms-1- A. 7 m/s north
- B. 43 m/s north
- C. 7 m/s south
- D. 20 m/s north
Explanation: The final velocity of the car can be calculated using the equation: vf = vi + a·t, where vi is the initial velocity, a is the…
Correct answer: 7 m/s north- A. Option A: 4⁄3
- B. Option B: 3⁄4
- C. Option C: 1
- D. Option D: 1⁄2
Explanation: The time-displacement graph provides the slopes of the lines for objects A and B, which represent their velocities.
Correct answer: Option A: 4⁄3- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: As stone is moving with constant acceleration (gravitational acceleration). As the slope of graph (C) is constant.
Correct answer: Option C- A. Zero
- B. 0.5 N s toward the wall
- C. 0.5 N s away from the wall
- D. 3.5 N s away from the wall
Explanation: The initial momentum (Pi) of the ball is calculated as mvi = (1 kg)(2 m/s) = 2 N s towards the wall.
Correct answer: 3.5 N s away from the wall- A. 120 m
- B. 60 m
- C. 30 m
- D. 15 m
Explanation: To determine the length of the train, first calculate the relative velocity of the bullet with respect to the train.
Correct answer: 120 m- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: H = (V2sin2θ)/2g T= (2Vsinθ)/g T2 is used in all options so converting this into T2 = (4V2sin2θ)/g2 H/T2 =((V2sin2θ)/g) / ((4V2sin2θ)/g2)…
Correct answer: Option A- A. A bicycle, when its speed changes from rest to 2.5 m/s in 2 s
- B. A car, when its speed changes from rest to 15 m/s in 5 s
- C. A lorry, when its speed changes from rest to 20 m/s in 15 s
- D. A motorbike, when its speed changes from rest to 50 m/s in 10 s
Explanation: The acceleration of a vehicle is calculated using the formula: Acceleration = (Final Velocity - Initial Velocity) / Time.
Correct answer: A motorbike, when its speed changes from rest to 50 m/s in 10 s- A. Remains constant
- B. Varies with time
- C. Zero
- D. Is taken as positive
Explanation: In projectile motion, the only force acting on the projectile in the vertical direction is gravity.
Correct answer: Remains constant