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 15 of 71
- A. (v₁ + v₂)/2
- B. (v₁v₂)/2
- C. (v₁v₂)/(v₁ + v₂)
- D. (2v₁v₂)/(v₁ + v₂)
Explanation: To calculate Imran's average speed, we use the formula: Average Speed = Total Distance / Total Time.Imran travels 2 meters at speed v₁ and…
Correct answer: (2v₁v₂)/(v₁ + v₂)- A. force acts on the body
- B. mass of the body
- C. velocity of the body
- D. both the mass and velocity of the body
Explanation: Momentum is dependent on both the mass and velocity of an object. Mathematically, momentum p is calculated as the product of an object's…
Correct answer: both the mass and velocity of the body- A. Air resistance increases with increase in velocity
- B. The Earth's gravitational field decreases as the object falls
- C. The mass of the object remains constant
- D. The weight of the object increases as it falls
Explanation: When an object falls in the Earth's gravitational field, it eventually reaches a steady velocity, known as terminal velocity.
Correct answer: Air resistance increases with increase in velocity- A. Distance
- B. Force
- C. Acceleration
- D. Both A and B
Explanation: When a body moves in a straight line, its displacement coincides with the distance covered by the body.
Correct answer: Distance- A. acceleration
- B. velocity
- C. vertical velocity
- D. horizontal velocity
Explanation: At the maximum height of a projectile's trajectory, the vertical velocity becomes zero.
Correct answer: vertical velocity- A. 10m
- B. 15m
- C. 20m
- D. 25m
Explanation: The formula to calculate the distance fallen under gravity is:Distance = 0.5 × acceleration due to gravity × time²Calculating Distance…
Correct answer: 15m- A. perfectly elastic
- B. partially elastic
- C. completely inelastic
- D. none of these
Explanation: When two bodies stick together after a collision, it's termed a completely inelastic collision.
Correct answer: completely inelastic- A. chance of collision
- B. force acting
- C. velocity
- D. impulse
Explanation: A motorcycle safety helmet extends the time of collision ∆t when a rider's head hits an object during an accident.
Correct answer: force acting- A. solid and soft
- B. soft and elastic
- C. solid and hard
- D. hard and elastic
Explanation: For a collision between two bodies to be elastic, both bodies need to possess properties that allow them to regain their original shapes…
Correct answer: hard and elastic- A. momentum changes but K.E remains conserve
- B. K.E changes but momentum remains conserve
- C. both momentum and K.E changes
- D. both momentum and K.E remains conserve
Explanation: In an inelastic collision, both momentum and kinetic energy change within the system due to the conversion of some initial kinetic energy…
Correct answer: both momentum and K.E changes- A. -M2/M1
- B. M2/M1
- C. (M1/M2)1/2
- D. (M2/M1)1/2
Explanation: Applying Conservation of MomentumInitially, the body is at rest, resulting in an initial momentum of zero.After the explosion, the two…
Correct answer: -M2/M1- A. H = gT2/8
- B. H = 8T2/g
- C. H = 8g/T2
- D. H = 8/gT2
Explanation: The correct relation between time of flight and maximum height is H = gT2/8.
Correct answer: H = gT2/8- A. Unequal
- B. Equal
- C. Zero
- D. None of these
Explanation: In a vacuum environment, where there is no air resistance, both the iron ball and wooden ball, despite their different materials…
Correct answer: Equal- A. 1st law of motion
- B. 2nd law of motion
- C. Law of conservation of momentum
- D. Law of conservation of energy
Explanation: The second law of motion, formulated by Newton, explains the relationship between an object's force, mass, and acceleration.
Correct answer: 2nd law of motion- A. Gas-filled balloon
- B. Bullet fired from a gun
- C. A football kicked
- D. A baseball shot
Explanation: A gas-filled balloon typically moves in an uncontrolled manner, often drifting with the wind or carried by air currents.
Correct answer: Gas-filled balloon- A. tan-1(1/4)
- B. tan-1(4)
- C. cos-1(1/4)
- D. sin-1(1/4)
Explanation: Let's denote the angle of projection as \( \theta \) and use the formulas for the range (R) and maximum height (H) in projectile…
Correct answer: tan-1(4)- A. 5m/s, 1m/s
- B. 3m/s, 3m/s
- C. 6m/s, 1m/s
- D. 4m/s, 2m/s
Explanation: Given:- When moving toward each other, the distance between them decreases at 6 m/s.- When moving in the same direction, the distance…
Correct answer: 5m/s, 1m/s- A. 4.9m
- B. 19.6m
- C. 39.2m
- D. 44.1m
Explanation: Given:- Time taken (t) = 2 s- Acceleration due to gravity (g) = 9.8 m/s²Using the Equation of Motion:The equation for the distance covered…
Correct answer: 39.2m- A. at2/2
- B. Vt
- C. a2t/2
- D. Both A and B
Explanation: Given:- Uniform acceleration for a body starting from rest.- Time (t).The equations of motion for uniformly accelerated motion starting…
Correct answer: Both A and B- A. Second law of motion
- B. Third law of motion
- C. First law of motion
- D. Law of Gravitation
Explanation: The third law of motion, stating that for every action, there is an equal and opposite reaction, is directly applicable to a rocket's…
Correct answer: Third law of motion