Forces Quiz
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5 questions, one answer each
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1. What happens to an object if the resultant force acting on it is zero?
- A. It always stops
- B. It stays at rest or moves at constant velocity
- C. It always accelerates
- D. It changes direction
2. A resultant force of 20 N acts on a 4 kg object. What is its acceleration?
- A. 4 m/s²
- B. 5 m/s²
- C. 16 m/s²
- D. 80 m/s²
3. An astronaut has a mass of 80 kg. On the Moon, g = 1.6 N/kg. What is their weight on the Moon?
- A. 80 N
- B. 128 N
- C. 800 N
- D. 1.6 N
4. A car moves at constant speed around a circular bend. Which statement is correct?
- A. Its velocity is constant
- B. There is no resultant force on it
- C. Its velocity is changing because direction changes
- D. Its acceleration is zero
5. Two skaters push off each other. Skater A (mass 50 kg) and Skater B (mass 70 kg) experience equal and opposite forces. Which best explains why Skater A moves off faster?
- A. A experiences a bigger force
- B. A has a smaller inertial mass, so for the same force it has a greater acceleration
- C. B's weight is greater
- D. Momentum is not conserved here