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Quiz Chapter 8: Force and Motion

10 questions · Form 2 Science Bab 8: Force and Motion

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which tool acts as a Third Class Lever?

  1. Pliers
  2. Nutcracker
  3. Fishing rod
  4. Seesaw
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Answer: C

A fishing rod is a third class lever (F - E - L), where effort is applied by the hand between the handle pivot and the load at the line tip.

2. Which type of force always acts directly opposite to the direction of motion between two moving touching surfaces?

  1. Gravitational force
  2. Frictional force
  3. Normal force
  4. Buoyant force
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Answer: B

Frictional force resists relative motion and acts in the direction opposite to movement.

3. What happens to the gas pressure inside a fixed closed container when the temperature of the gas increases?

  1. Gas pressure decreases
  2. Gas pressure increases
  3. Gas pressure drops to zero
  4. Gas pressure remains completely unaffected
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Answer: B

Higher temperature increases the kinetic energy of gas molecules, causing them to collide more frequently and forcefully against container walls, increasing pressure.

4. What is the SI unit used to measure force?

  1. Joule (J)
  2. Pascal (Pa)
  3. Newton (N)
  4. Watt (W)
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Answer: C

The SI unit for force is the Newton (N), named after Sir Isaac Newton.

5. In a second class lever, what is the position of the Load relative to the Pivot and Effort?

  1. Load is between Pivot and Effort
  2. Pivot is between Load and Effort
  3. Effort is between Load and Pivot
  4. Load and Effort are at the exact same location
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Answer: A

In second class levers (F - L - E), the Load is located between the Pivot and the Effort (e.g., wheelbarrow).

6. Why do high-heeled shoes sink more deeply into soft mud compared to flat-soled sneakers worn by a person of the same weight?

  1. High heels exert less total force on the ground
  2. High heels have a smaller contact surface area, creating higher pressure
  3. Flat sneakers create higher pressure on the ground
  4. High heels increase gravitational pull
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Answer: B

Pressure is inversely proportional to area (P = FA). Small contact surface area of a high heel concentrates weight, resulting in higher pressure.

7. A force of 200 N acts perpendicularly on a surface area of 2 m². What is the resulting pressure exerted on the surface?

  1. 400 Pa
  2. 100 Pa
  3. 0.01 Pa
  4. 202 Pa
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Answer: B

Pressure P = Force / Area = 200 N2 m² = 100 Pa (or Nm²).

8. If the contact surface area supporting an object is quadrupled (4x) while force remains constant, how does pressure change?

  1. Pressure increases by 4 times
  2. Pressure decreases to 14 of its original value
  3. Pressure remains the same
  4. Pressure doubles
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Answer: B

Pressure P = FA. Increasing area by 4 times reduces pressure to one-fourth (14).

9. What effect does force exhibit when a sculptor shapes clay with their hands?

  1. Changes object's direction
  2. Changes object's speed
  3. Changes object's shape and size
  4. Stops a moving object
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Answer: C

Applying force to malleable materials like clay alters their physical shape and size.

10. What force acts perpendicular to a surface to support an object resting on a table?

  1. Gravitational force
  2. Normal force
  3. Frictional force
  4. Buoyant force
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Answer: B

Normal force is the reaction force exerted by a surface perpendicular to an object resting upon it.

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