Newton's Second Law: Force, Mass and Acceleration · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Push, mass and how fast it picks up

Mathematics · Mechanics · ages 17-18
Name ______________________   Date ____________

  1. A 2 kg object feels a resultant force of 6 N. What is its acceleration in m/s squared?

    Answer: ______________

  2. A 2 kg object feels a resultant force of 6 N. What is its acceleration in m/s squared?

    Answer: ______________

  3. A shopping bag holds 5 kg of food on Earth (g = 10 N/kg). Which line states its mass and weight correctly?

    • Mass 5 kg and weight 50 N
    • Mass 50 kg and weight 5 N
    • Mass 5 N and weight 50 kg

  4. A 5 kg trolley accelerates at 2 m/s squared. What resultant force drives it?

    • 2.5 N
    • 7 N
    • 10 N

  5. A 2 kg bag of sugar sits on a shop scale on Earth (g = 10 N/kg). Dan says it weighs about 2 N. Is Dan right?

    Circle one:   True   False

  6. A 4 kg cart accelerates at 3 m/s squared. What resultant force, in N, drives it?

    Answer: ______________

  7. A 2 kg bag of sugar sits on a shop scale on Earth (g = 10 N/kg). Dan says it weighs about 2 N. Is Dan right?

    Circle one:   True   False

  8. A shopping bag holds 5 kg of food on Earth (g = 10 N/kg). Which line states its mass and weight correctly?

    • Mass 5 kg and weight 50 N
    • Mass 50 kg and weight 5 N
    • Mass 5 N and weight 50 kg
    • Mass 50 N and weight 5 kg

  9. A 0.5 kg ball feels a 2 N resultant force opposing its motion. What is its deceleration?

    • 1 m/s squared
    • 2 m/s squared
    • 4 m/s squared

  10. A 0.5 kg ball feels a 2 N resultant force opposing its motion. What is its deceleration?

    • 4 m/s squared
    • 1 m/s squared
    • 2 m/s squared
    • 0.25 m/s squared
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Answer key

For grown-ups. Fold this page away before handing over the rest.

Push, mass and how fast it picks up W1-mt_SKO85AcKdb-s1

  1. 3 · a = F over m = 6 over 2 = 3 m/s squared.
  2. 3 · a = F over m = 6 over 2 = 3 m/s squared.
  3. Mass 5 kg and weight 50 N · Mass stays 5 kg while weight is 5 times 10 = 50 N.
  4. 10 N · F = 5 times 2 = 10 N.
  5. False · Weight is 2 times 10 = 20 N, not 2 N, so Dan is wrong.
  6. 12 · F = 4 times 3 = 12 N.
  7. False · Weight is 2 times 10 = 20 N, not 2 N, so Dan is wrong.
  8. Mass 5 kg and weight 50 N · Mass stays 5 kg while weight is 5 times 10 = 50 N.
  9. 4 m/s squared · a = 2 over 0.5 = 4 m/s squared against the motion.
  10. 4 m/s squared · a = 2 over 0.5 = 4 m/s squared against the motion.
Worksheet · LightMySky