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 71 of 71
- A. Moves upward with increasing speed
- B. Moves upward with decreasing speed
- C. Remains stationary
- D. Moves downward with increasing speed
Explanation: The correct answer is that the scale shows the highest reading when the elevator moves upward with increasing speed.
Correct answer: Moves upward with increasing speed- A. Newton's first law
- B. Newton's second law
- C. Both Options A and B are correct
- D. They are unrelated
Explanation: Newton's second law provides a mathematical description of force as it relates to mass and acceleration, forming the basis for…
Correct answer: Newton's second law1403. A particle is moving with a constant speed a long a straight line. A force is not required to:
- A. Increased speed
- B. Decreased the momentum
- C. Change the direction
- D. Keep it moving with uniform velocity
Explanation: According to Newton's law if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in…
Correct answer: Keep it moving with uniform velocity- A. Zero
- B. 2.5 kg
- C. 5 kg
- D. 10 kg
Explanation: The reading of the spring balance in this case would be zero.When the lift falls with an acceleration of 10 m/s^2, the weight of the body…
Correct answer: Zero- A. It is equal to the weight of the man.
- B. It is greater than the force exerted by the floor on the man.
- C. It is less than the force exerted by the floor on the man.
- D. It is less than the weight of the man.
Explanation: As the lift is accelerating vertically downward so (g-a). The apparent weight of a man would become less than the actual weight.
Correct answer: It is less than the weight of the man.- A. They act in opposite directions
- B. They both act at the same point
- C. They both act on the same body
- D. They both have the same magnitude
Explanation: Two equal and opposite parallel forces not acting along the same line form a couple.
Correct answer: They both act at the same point- A. Orthogonal
- B. Supplementary
- C. Complementary
- D. Sum is 450
Explanation: Complementary angles are angles that add up to 90 degrees (e.g., 30 degrees and 60 degrees).
Correct answer: Complementary- A. R= V²sin∅ Cos∅/g
- B. R= V²i Sin ∅/2g
- C. R = V² Sin (2∅)/g
- D. R= V² i sin ∅ (2∅)/g
Explanation: The correct equation for the horizontal range of a projectile is: R = V²sin(2∅)/g where: R is the horizontal range of the projectile (the…
Correct answer: R = V² Sin (2∅)/g- A. circular path
- B. hyperbolic path
- C. straight line path
- D. parabolic path
Explanation: This option is correct. When a ball is dropped from a moving train, it follows a parabolic path.
Correct answer: parabolic path- A. 30°
- B. 45°
- C. 60°
- D. 90°
Explanation: improve the jumping record, the long jumper should jump at an angle of 45°.Here's why:Range of a projectile: The horizontal distance a…
Correct answer: 45°- A. A little above the bird
- B. A little below
- C. Exactly at the bird
- D. Very high
Explanation: When a hunter aims at a bird in a tree, they should aim a little above the bird.
Correct answer: A little above the bird- A. Zero
- B. Minimum
- C. Maximum
- D. In between maximum and minimum
Explanation: In projectile motion, the velocity of a projectile can be broken down into horizontal and vertical components.
Correct answer: Minimum- A. 0
- B. 1/2g, horizontally
- C. g, upward
- D. g, downward
Explanation: At the highest point of travel, the vertical velocity is zero but since the force of gravity still is acting on it, the acceleration is…
Correct answer: g, downward- A. Zero
- B. E/8
- C. E/4
- D. E/2
Explanation: K.E=E=1/2mv2K.E=1/2mvx2 (horizontal velocity)K.E= 1/2m x (vcos 60)2K.E=1/2mv2 (0.5)2K.E=1/2mv2 (o.25)K.E=1/2mv2 (¼)K.E= ¼ ( ½ mv2)K.E = ¼…
Correct answer: E/41415. Two projectiles are in flight at the same time. The acceleration of one relative to the other:
- A. Is always 9.8 m/s2
- B. Can be as large as 19.8 m/s2
- C. Can be horizontal
- D. Is zero
Explanation: The correct answer is that the acceleration of one projectile relative to the other is zero.
Correct answer: Is zero- A. 0o
- B. 45o
- C. 90o
- D. None of the above
Explanation: When the projectile reaches the highest point of its trajectory, the angle between its velocity and acceleration is 90 degrees.
Correct answer: 90o