Physics Test: Forces (Intermediate Level)
Name: ____________________________
Class: ____________________________
Date: ____________________________
Instructions: Answer all questions clearly.
1. Define force and give its SI unit.
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2. State Newton’s First Law of Motion.
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3. A 5 kg object is acted on by a force of 20 N. Find its acceleration.
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4. A book is resting on a table. Name and describe the forces acting on it.
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5. Explain what normal force is.
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6. A box weighs 60 N and is at rest. What is the normal force acting on it?
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7. Two forces act on an object: 25 N right and 15 N left. Find the resultant force.
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8. What is friction and in which direction does it act?
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9. Give two factors that affect friction.
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10. Define tension force with one example.
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11. A 10 kg object is lifted upward with a force of 120 N. Is it accelerating upward or
downward?
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12. What is the weight of a 8 kg object? (g = 9.8 m/s²)
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13. What happens when forces acting on an object are balanced?
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14. A moving car stops due to friction. Explain why.
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15. State the difference between mass and weight.
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16. A force of 50 N acts on an object of mass 10 kg. Find acceleration.
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17. Why do objects in space keep moving unless acted on?
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18. Name all forces acting on a falling object in air.
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19. Explain why wearing shoes with rubber soles increases friction.
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20. A rope holds a 15 kg hanging object. What force is in the rope and what is its direction?
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