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 17 of 71
- A. parallel
- B. perpendicular
- C. anti-parallel
- D. at maximum height v=0
Explanation: (d) At maximum height v=0 (Correct): This is the correct answer. At the peak of its trajectory, the projectile momentarily stops its…
Correct answer: at maximum height v=0- A. constant velocity
- B. variable velocity
- C. constant acceleration
- D. constant retardation
Explanation: When air resistance is ignored, the only force acting on the projectile horizontally is its initial velocity.
Correct answer: constant velocity- A. 30°
- B. 60°
- C. 45°
- D. 90°
Explanation: At maximum height in projectile motion, the vertical component of velocity becomes zero.
Correct answer: 60°- A. 180°
- B. 90°
- C. 45°
- D. 0°
Explanation: During retarded motion (deceleration), the velocity and acceleration vectors are opposite in direction.
Correct answer: 180°- A. Kinetic energy (K.E)
- B. Temperature
- C. Velocity
- D. Momentum
Explanation: In an inelastic collision, kinetic energy is not conserved due to the loss of energy in the form of deformation, heat, etc.
Correct answer: Momentum326. If R is the maximum horizontal range of a projectile, then the greatest height attained by it is
- A. R
- B. 2R
- C. R/2
- D. R/4
Explanation: (c) R/2 (Correct): This is the correct answer. For a projectile launched at an angle of 45 degrees (which maximizes the horizontal range)…
Correct answer: R/2- A. −2mv
- B. −mv
- C. mv
- D. 0
Explanation: Here's why:In an elastic collision, the relative velocity between the colliding objects changes direction, but the magnitude of the…
Correct answer: mv- A. 45∘
- B. 76∘
- C. 60∘
- D. 90∘
Explanation: The correct answer is: (a) 45∘Here's why:When dealing with projectile motion, H (maximum height) and R (horizontal range) are related to…
Correct answer: 45∘- A. long
- B. medium
- C. short
- D. may be a or b
Explanation: Ballistic missiles can be used for both long-range and medium-range targets, depending on their design and intended purpose.Incorrect…
Correct answer: may be a or b- A. 10 m/s
- B. 5 m/s
- C. 2.5 m/s
- D. m/s
Explanation: In an elastic collision between identical balls, when one ball comes to rest after the collision, the other ball will move forward with…
Correct answer: 10 m/s- A. inertia
- B. momentum
- C. moment of inertia
- D. force
Explanation: According to Newton's first law of motion, an object will remain at rest or in uniform motion in a straight line unless acted upon by an…
Correct answer: inertia- A. 25 N
- B. 5 N
- C. 50 N
- D. 125 N
Explanation: The rate of change of momentum is given by the formula F=Δp/Δt , where F is the force applied, Δp is the change in momentum, and Δt is the…
Correct answer: 5 N- A. 122 1 m/s² towards north-west
- B. 122 1 m/s² towards north-east
- C. 122 1 m/s² towards south-west
- D. 122 1 m/s² towards south-east
Explanation: The correct option represents the average acceleration towards the direction between east and north, which is north-east.
Correct answer: 122 1 m/s² towards north-east- A. 25 N
- B. 50 N
- C. 5 N
- D. 125 N
Explanation: The rate of change of momentum is given by the formula Force×TimeForce×Time. Here, the force is 5N, and the time is 5 seconds.
Correct answer: 50 N- A. Y = 2x -5x2
- B. 4Y = 2x -5x2
- C. 4Y = 2x -25x2
- D. Y = x -5x2
Explanation: When a projectile is launched at an angle with an initial velocity of u m/s, its horizontal and vertical components are given…
Correct answer: Y = 2x -5x2- A. 1/r
- B. r
- C. r2
- D. 1/r2
Explanation: Here's how to solve this projectile motion problem and find the relationship between the product of times (t₁t₂) and the horizontal…
Correct answer: r- A. v/2√(1+2cos2q)
- B. v/2√(1+2sin2q)
- C. v/2√(1+3cos2q)
- D. v cos q
Explanation: v is the initial speed of the particle.θ is the angle of projection.Here's the explanation:Horizontal and Vertical Components:The initial…
Correct answer: v cos q- A. 0
- B. 45
- C. 90
- D. 60
Explanation: Work done by a force: Work is defined as the transfer of energy from a force acting on an object through a certain distance.
Correct answer: 90- A. sin Ө
- B. cos Ө
- C. tan Ө
- D. cot Ө
Explanation: For the object to slide at a constant speed, the frictional force must be equal to mgsinθ.μN=mgsinθSubstituting the expression for N…
Correct answer: tan Ө- A. 300
- B. 600
- C. 900
- D. 1200
Explanation: When two forces are at an angle θ, the resultant (R) can be found using the vector addition:R=F12 +F22 +2F1 F2 cosθ
Correct answer: 600