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 46 of 71
- A. 30 m
- B. 20 m
- C. 40 m
- D. 60 m
Explanation: Option C is correct.The range of a projectile is maximum when the angle of projection is 45 degrees.
Correct answer: 40 m- A. 30 ms-1
- B. 40 ms-1
- C. 50 ms-1
- D. 60 ms-1
Explanation: The horizontal component of velocity remains constant throughout the motion, vertical component is initially zero.
Correct answer: 50 ms-1- A. Impulse
- B. Kinetic energy
- C. Power
- D. Weight
Explanation: Option D is correct. The rate of change of momentum of a body falling freely under gravity is equal to its weight.
Correct answer: Weight- A. 6ms-1
- B. 8ms-1
- C. 12ms-1
- D. 10ms-1
Explanation: Option A is correct.To determine the velocity with which the 10 kg object hit the second 5 kg object, we can apply the principle of…
Correct answer: 6ms-1- A. 50 kg-m/s
- B. 100 kg-m/s
- C. 300 kg-m/s
- D. 1000 kg-m/s
Explanation: To find the change in momentum, use the impulse-momentum theorem: Impulse = Force x Time = Change in momentum.Here, the force applied is…
Correct answer: 100 kg-m/s906. An aircraft is moving with a velocity of 300ms-1. If all the forces acting on it are balanced, then
- A. It continues to move with the same velocity.
- B. It will explode.
- C. It will gradually slow down.
- D. It will fall down instantly.
Explanation: The correct answer is that the aircraft continues to move with the same velocity.
Correct answer: It continues to move with the same velocity.- A. A
- B. B
- C. C
- D. D
Explanation: C is the correct option. Avg speed= Total distance/ total time Total distance =X Total time;time for V1=2X/5V1 time for V2 = 3 X/ 5V2total…
Correct answer: C- A. A
- B. B
- C. C
- D. D
Explanation: The formula for time is = 2 ( vi sin θ )/g T is directly proportional to Vi and hence doubling it will give double time.The formula for…
Correct answer: D- A. A
- B. B
- C. C
- D. D
Explanation: B is the correct option. Momentum and total energy are always conserved in elastic as well as inelastic reactions.
Correct answer: B- A. 1 sec
- B. 2 sec
- C. 3 sec
- D. 1.5 sec
Explanation: Option A is correct. The formula for the time of flight of a projectile launched at an angle θ with an initial velocity vi is given by…
Correct answer: 1 sec- A. 30o
- B. 60o
- C. 15o
- D. 45o
Explanation: The range of a projectile is given by R = (vi2 sin(2θ))/g. The maximum range (Rmax) occurs at θ = 45o because sin(90o) = 1.
Correct answer: 15o- A. 2.5ms-1
- B. 5ms-1
- C. 10ms1
- D. 20ms-1
Explanation: The body is projected horizontally, meaning the initial vertical velocity is zero.
Correct answer: 10ms1913. The distance travelled by a body is proportional to the square of time. The body is moving with
- A. Uniform acceleration
- B. Uniform velocity
- C. Variable acceleration
- D. All of the above
Explanation: The correct answer is Uniform acceleration. When the distance travelled by a body is proportional to the square of time, it describes a…
Correct answer: Uniform acceleration- A. 1:2
- B. 1:3
- C. 1:4
- D. 1:√2
Explanation: The ratio will be h1/h2= sin^2(30)/sin^2(60) (as the initial velocities and g are same they are cancelled out) = 1/3Hence B is the correct…
Correct answer: 1:3- A. 7.0 m/s2
- B. 5.0 m/s2
- C. 0.71 m/s2
- D. 35.0 m/s2
Explanation: The correct answer is 0.71 m/s2. According to Newton's second law of motion, F = ma, where F is the net force, m is the mass, and a is the…
Correct answer: 0.71 m/s2- A. 35o and 75o
- B. 10o and 50o
- C. 25o and 65o
- D. None of the above
Explanation: For two projectiles fired at the same speed, complementary angles (those that add up to 90 degrees) will result in the same range.
Correct answer: 25o and 65o- A. 45 kmh-1
- B. 40 kmh-1
- C. 35 kmh-1
- D. 30 kmh-1
Explanation: To find the average speed, we first calculate the total distance. The train travels for the first half hour at 30 kmh-1, covering a…
Correct answer: 40 kmh-1- A. 1 sec
- B. 3 sec
- C. 2 sec
- D. 4 sec
Explanation: C is the correct answer. v=u+at (at max height v =0) 0=19.6 + (-10)t t=1.96s= 2s
Correct answer: 1 sec- A. Area under speed-time graph
- B. Area under distance-time graph
- C. Slope of velocity-time graph
- D. Slope of distance-time graph
Explanation: The correct answer is the area under the speed-time graph, which represents the distance traveled.
Correct answer: Area under speed-time graph- A. Average velocity is zero but not average speed
- B. Average speed is zero but not average velocity
- C. Both average velocity and average speed are not zero
- D. Both average speed and average velocity are zero
Explanation: Average speed is calculated as the total distance traveled divided by the time taken, while average velocity is calculated as the total…
Correct answer: Average velocity is zero but not average speed