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Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
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4.6 | Newton's Second Law of Motion |
1. Three forces are acting at a 10 kg object as shown in the figure.
What is the magnitude and the direction of acceleration caused by these forces? Take cos 37° = 0.8, sin 37° = 0.6.
Correct Answer: D
2. A 2000 kg car is accelerating at 2 m/s2 when moving along a horizontal road as shown in the figure.
The friction coefficient between the tires and the asphalt is 0.3. If the moving force produced by the engine is 11000 N, what is the magnitude of air resistance? Take g = 10 N/kg.
Correct Answer: A
3. A man is pulling a 120 kg object along a horizontal surface as shown in the figure.
If the object decelerates at 0.2 m/s2, what is the magnitude of the pulling force F? Take g = 10 N/kg. Ignore the air resistance.
Correct Answer: C
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