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 38 of 71
- A. the one fired at 200
- B. the one fired at 700
- C. Both have the same range
- D. None of these
Explanation: Range for projectiles fired at complementary angles ( angles which add up to 90°) is the same; therefore, option C is correct since 20° +…
Correct answer: Both have the same range- A. 86.6 ms-1
- B. 50 ms-1
- C. 60 ms-1
- D. 163.2 ms-1
Explanation: To solve this question, we need to break the velocity into horizontal and vertical components.
Correct answer: 50 ms-1- A. π/3
- B. π/6
- C. π/30
- D. π/12
Explanation: Angular speed is the rate at which an object moves around a circle. In this case, the second's hand completes one full rotation in 60…
Correct answer: π/30- A. One radian
- B. One rotation
- C. One degree
- D. Half rotation
Explanation: The angle subtended at the center of a circle by an arc equal to its radius is defined as one radian.
Correct answer: One radian- A. Remains constant
- B. Changes in magnitude
- C. Changes in direction
- D. Changes both in magnitude and direction
Explanation: When a particle moves in a circle describing equal angles in equal intervals of time, it undergoes circular motion.
Correct answer: Changes in direction- A. By the gravitational force
- B. Due to the lack of proper centripetal force
- C. Due to the rolling frictional force between the tire and the road
- D. Due to the reaction of the ground
Explanation: When a car is taking a turn on a horizontal road, it needs centripetal force to keep it moving in a curved path.
Correct answer: Due to the lack of proper centripetal force- A. Remains horizontal
- B. Inclines inwards
- C. Inclines outwards
- D. Makes wings vertical
Explanation: The explanation is given below:When an airplane is taking a turn in a horizontal plane, it inclines inwards.
Correct answer: Inclines inwards- A. Towards the centre
- B. Radius
- C. Tangent to the tire
- D. Motion
Explanation: When a bicycle is in motion, the mud on the tire follows the laws of physics, particularly the principle of inertia.
Correct answer: Tangent to the tire749. A body in simple harmonic motion makes n complete oscillations in one second. Its frequency is:
- A. 1 hertz
- B. 1/n hertz
- C. n hertz
- D. Zero
Explanation: In simple harmonic motion (SHM), the frequency (f) is the number of complete oscillations the body makes in one second.
Correct answer: n hertz750. The centripetal acceleration of a body moving with velocity 2 ms-1 in a circle of radius 0.3 m is:
- A. 0.6 ms-2
- B. 13.3 ms-2
- C. 0.15 ms-2
- D. 6.6 ms-2
Explanation: In this question, the centripetal acceleration of a body moving in a circle can be calculated using the formula: a = v2 / r, where v is…
Correct answer: 13.3 ms-2- A. K-2
- B. Muree
- C. Lahore
- D. Karachi
Explanation: The key concept to understand in this question is the relationship between the acceleration due to gravity (g) and the motion of a…
Correct answer: Karachi- A. Remains constant
- B. Changes continuously
- C. Becomes zero
- D. None of the above
Explanation: When an object moves along a circular path, its velocity is constantly changing.
Correct answer: Changes continuously- A. m a
- B. m g
- C. m g - m a
- D. m g + ma
Explanation: In this question, the key concept is to recognize the forces acting on the mass in the elevator.
Correct answer: m g + ma- A. Velocity of the stone
- B. Mass of the stone
- C. Tension in the string
- D. Air friction
Explanation: When an object moves in a circular path, it experiences a centripetal force directed towards the center of the circle, necessary to…
Correct answer: Tension in the string- A. Direction only
- B. Magnitude only
- C. Both magnitude and direction
- D. Neither magnitude nor direction
Explanation: In this question, we are discussing the acceleration of a body in uniform circular motion.
Correct answer: Magnitude only- A. Zero
- B. Maximum
- C. Greater than the weight of the stone
- D. Equal to the weight of the stone
Explanation: When a stone is whirled in a vertical circle at the end of a string, the tension in the string varies depending on the stone's position in…
Correct answer: Zero- A. 0.8
- B. 1.6
- C. 4
- D. 5
Explanation: In this question, we are dealing with motion in two dimensions, specifically circular motion.
Correct answer: 5- A. m ω
- B. mr ω
- C. mr2 ω
- D. mr ω2
Explanation: When a body moves in a circle with constant angular velocity, its angular momentum about a point can be calculated using the formula L=Iω…
Correct answer: mr2 ω- A. r v2
- B. v2/r
- C. Zero
- D. None of these
Explanation: When a body of mass m moves with a constant speed v in a circular path of radius r, its tangential acceleration is zero.
Correct answer: Zero- A. The linear momentum is constant but the kinetic energy varies
- B. The kinetic energy is constant but the linear momentum varies
- C. Both kinetic energy and linear momentum are constant
- D. Neither the linear momentum nor the kinetic energy is constant
Explanation: Key Concepts: In a horizontal circle with constant angular velocity, the kinetic energy of a particle remains constant due to its constant…
Correct answer: The kinetic energy is constant but the linear momentum varies