Skip to main content

Force and Motion MCQs for MDCAT Practice

Physics section, Force and Motion chapter. Up to eight free sample questions, each with the correct answer and a worked explanation. The full chapter opens in the app.

The bank has 1,521 active questions on this chapter. Your first 500 practice attempts are free, and every attempt includes a worked explanation.

  1. Question 1
    When upward acceleration of an elevator is increased the weight of the body in it is
    • Zero
    • Further increased (correct answer)
    • Negative
    • Constant
    Correct answer: B
    Increasing an elevator's upward acceleration increases the apparent weight of a body inside due to a greater normal force required to produce the acceleration.
  2. Question 2
    Two wires of equal length and cross-section are suspended as shown. Their Young’s moduli are Y1 and Y2, respectively. The equivalent Young’s modulus will be:
    Diagram for this question, with no written description.
    • Y1 + Y2
    • (Y1 + Y2) / 2 (correct answer)
    • (Y1 * Y2) / (Y1 + Y2)
    • √(Y1 * Y2)
    Correct answer: B
    Two identical wires connected in parallel share the same extension; the equivalent Young's modulus is the arithmetic mean (Y1+Y2)/2 since stresses add while strain stays equal.
  3. Question 3
    An object with an initial velocity of 40m/s moves along a straight axis under constant acceleration. Three seconds later,its velocity is 14m/s. How far did it travel during this time?
    • 81 m (correct answer)
    • 17 m
    • 67 m
    • 57 m
    • 77 m/s
    Correct answer: A
    Calculate displacement under constant acceleration using initial velocity, final velocity, and time. This problem tests kinematic equations.
  4. Question 4
    Which of the following expressions represent (8x3 + 125) / (2x + 5)?
    • 4x2 – 10x – 25
    • 4x2 – 20x + 25
    • 4x2 + 10x + 25
    • 4x2 – 10x + 25 (correct answer)
    Correct answer: D
    This question tests algebraic manipulation, specifically the sum of cubes factorization, a common tool in physics problem-solving.
  5. Question 5
    An object is taken from the earth to a planet where the value ‘g’ is 20 m/s2, if it is compared with value of ‘g’ earth, which of the following statement is true?
    • Weight at the planet will be greater (correct answer)
    • Weight at the Earth will be greater
    • Mass at the planet will be greater
    • Mass at the planet will be smaller
    Correct answer: A
    This question tests the distinction between mass and weight, and how weight changes with gravitational acceleration.
  6. Question 6
    A fireman wants to slide down a rope. The breaking load of the rope is 3/4 of the weight of the man. With what acceleration should the fireman slide down? (Acceleration due to gravity is 'g')
    • g
    • g/4 (correct answer)
    • 3g/4
    • 0
    Correct answer: B
    This question tests understanding of Newton's second law applied to a scenario involving tension and weight, specifically when the breaking point of a rope is a factor.
  7. Question 7
    For a given value of initial velocity, the maximum range of a projectile can be achieved by throwing it at an angle of:
    • 90°
    • 60°
    • 45° (correct answer)
    • 30°
    Correct answer: C
    Maximize projectile range by launching at 45° for a given initial velocity, a fundamental concept in projectile motion.
  8. Question 8
    A ball is projected vertically upwards from the ground with a velocity of 20 m/s. How high will it go? (Take g = 10 m/s2)
    • 5 m (correct answer)
    • 10 m
    • 15 m
    • 20 m
    • 25 m
    Correct answer: A
    Calculate maximum height of a vertically projected object using kinematic equations, considering gravity's deceleration.

Practise all 1,521 Force and Motion questions

A free account keeps your correct, incorrect and unseen questions separate, and shows the explanation after every attempt.

Create a free account

Read the full Force and Motion chapter notes: Force and Motion notes. Or browse every chapter.