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Simple Machines

question 1 of 2 Grade: Ten - G10
question 1 of 2 Grade: Ten - G10

Q: A simple machine of velocity ratio 5 lifts 600N through 20m with 80% efficiency. What effort is applied?

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Did You Know?

2 sin 2x = -1 → sin 2x = -0.5. Reference angle = 30°. Sin negative in 3rd & 4th quadrants: 2x = 180+30=210°, 360-30=330°, plus full cycles: 2x=210+360=570°, 330+360=690°. But 0≤x≤360 → 0≤2x≤720. So 2x = 210, 330, 570, 690. Thus x = 105°, 165°, 285°, 345°.

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Did You Know?

2 sin 2x = -1 → sin 2x = -0.5. Reference angle = 30°. Sin negative in 3rd & 4th quadrants: 2x = 180+30=210°, 360-30=330°, plus full cycles: 2x=210+360=570°, 330+360=690°. But 0≤x≤360 → 0≤2x≤720. So 2x = 210, 330, 570, 690. Thus x = 105°, 165°, 285°, 345°.

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