Two projectiles are launched with the same speed at 30° and 60°. What is the ratio of their maximum heights, H₃₀ : H₆₀?
Correct answer D. 1 : 3
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Force and Motion MCQs
Force and Motion MCQs cover displacement, velocity and acceleration, motion graphs, projectile motion, Newton's laws and the conservation of momentum in collisions and explosions. They help MDCAT, ECAT and FSc candidates revise kinematics and dynamics, and every question on MCQs360 shows its correct answer instantly.
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- Fluid Dynamics 30
- Electrostatics 30
- Electronics 30
- Electromagnetism 30
- Current Electricity 30
- Work and Energy 30
- Waves 30
- Vectors and Equilibrium 30
- Nuclear Physics 30
- Dawn of Modern Physics 30
- Thermodynamics 30
- Rotational and Circular Motion 30
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- Force and Motion 30
A 3 kg shell at rest explodes into a 1 kg piece and a 2 kg piece. The 1 kg piece moves at 12 m/s. What is the velocity of the 2 kg piece?
Correct answer D. 6 m/s in the opposite direction
A 1 kg ball moving at 6 m/s makes a head-on elastic collision with a stationary 2 kg ball. What is the velocity of the 2 kg ball afterwards?
Correct answer C. 4 m/s
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A 2 kg trolley moving at 6 m/s collides with a stationary 4 kg trolley and they stick together. What is their common velocity?
Correct answer D. 2 m/s
A 4 kg rifle fires a 20 g bullet with a muzzle speed of 400 m/s. What is the recoil speed of the rifle?
Correct answer D. 2 m/s
A 0.2 kg ball hits a wall at 10 m/s and rebounds along the same line at 8 m/s. The contact lasts 0.04 s. What is the average force on the ball?
Correct answer B. 90 N
A ball is thrown horizontally at 15 m/s from the top of a 20 m high cliff. Taking g = 10 m/s², how far from the foot of the cliff does it land?
Correct answer D. 30 m
A ball is thrown at 30 m/s at 30° above the horizontal. Taking g = 10 m/s², what is its time of flight?
Correct answer C. 3 s
A stone is projected at 20 m/s at 45° to the horizontal. Taking g = 10 m/s², what is its horizontal range?
Correct answer C. 40 m
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A ball is projected at 20 m/s at 30° above the horizontal. Taking g = 10 m/s², what maximum height does it reach?
Correct answer D. 5 m
A car speeds up uniformly from 5 m/s to 25 m/s in 4 s. What is its acceleration?
Correct answer A. 5 m/s²
A cyclist moves 120 m east and then 50 m west in a total time of 20 s. What is the average velocity?
Correct answer D. 3.5 m/s east
On which factors does the time of flight of an ideal projectile depend?
Correct answer A. The vertical component of launch velocity and g
A bomb at rest explodes into two fragments. How do the fragments move?
Correct answer D. In opposite directions with equal magnitudes of momentum
Why do the action and reaction forces of Newton’s third law not cancel each other?
Correct answer B. They act on different bodies
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A ball moving with speed u makes an elastic head-on collision with an identical ball at rest. What happens after the collision?
Correct answer B. The first ball stops and the second moves with speed u
In a one-dimensional elastic collision between two bodies, which statement is correct?
Correct answer B. Relative speed of approach equals relative speed of separation
What is the characteristic of a perfectly inelastic collision?
Correct answer A. The bodies stick together and move with a common velocity
Which quantities are conserved in a perfectly elastic collision?
Correct answer C. Both momentum and kinetic energy
Impulse of a force is equal to ____
Correct answer D. the change in momentum of the body
About Force and Motion MCQs
The kinematics questions ask what the slope and area of displacement-time and velocity-time graphs represent and how uniform and variable acceleration differ. Projectile questions use horizontal and vertical components to find maximum height, time of flight and range, and ask for the angle that gives maximum range or an equal range. Dynamics questions cover Newton's laws, with the second law written as the rate of change of momentum, and the third law leading to conservation of momentum. You will meet explosions of bodies at rest, recoil, and elastic and inelastic collisions in one dimension, including what happens when identical balls collide head-on.
Key facts to remember
- The slope of a displacement-time graph gives velocity; the slope of a velocity-time graph gives acceleration, and the area under it gives displacement.
- Projectile formulas: maximum height H = v₀² sin²θ/2g, time of flight T = 2v₀ sin θ/g, range R = v₀² sin 2θ/g.
- Range is greatest at θ = 45°, and launch angles θ and (90° − θ) give the same range.
- Newton's second law: F = Δp/Δt; for constant mass this becomes F = ma.
- Momentum is conserved in all collisions and explosions; kinetic energy is conserved only in elastic collisions.
- In a 1D elastic collision, relative speed of approach equals relative speed of separation.
Exams that include Force and Motion MCQs
Pakistan
- MDCAT
- ECAT (UET)
- NUMS
- AKU
- FSc boards
India
- NEET
- JEE Main
Bangladesh
- HSC
- Medical Admission Test
How to prepare for Force and Motion MCQs
- For projectile MCQs, treat horizontal motion (constant velocity) and vertical motion (acceleration g) separately.
- In explosion questions from rest, total momentum is zero, so the fragments move in opposite directions with speeds inversely proportional to their masses.
- Memorise that equal masses exchange velocities in a head-on elastic collision; it answers several MCQs directly.
- Use g = 10 m/s² when the question says so, and check units before choosing an answer.
Frequently asked questions
Which exams ask Force and Motion MCQs?
Force and Motion is part of the FSc physics syllabus, so its MCQs appear in MDCAT, ECAT (UET), NUMS and AKU entry tests and in FSc board papers. Students in India meet the same ideas in NEET and JEE Main, and Bangladeshi students in HSC and the medical admission test.
What is the difference between elastic and inelastic collisions?
In an elastic collision both momentum and kinetic energy are conserved. In an inelastic collision momentum is conserved but some kinetic energy becomes heat, sound or deformation. In a perfectly inelastic collision the bodies stick together and move with a common velocity.
Last reviewed October 2026