Question
A mass m moves in a vertical circle of radius R under
gravity. What is the minimum mechanical energy required to complete the circle?Solution
To complete a vertical circular motion , the mass must reach the top of the circle with non-zero speed , so that the tension at the top is ≥ 0 . The minimum speed at the top is found by setting tension = 0 and using: 
More General science Common Questions
1500 × 60% of 25% = ? 2
[1.45 X 1.45 X 1.45 + 0.55 X 0.55 X 0.55 + 4.785] = ?
72 + 122 - 25% of 600 = ?
22 * 6 + 45% of 90 + 65% of 180 = ?
- What will come in place of (?) in the given expression.
√324 + √121 – √49 = ? 5.5 × 3.2 × 2.3 = ?
What will come in the place of question mark (?) in the given expression?
(√676 of √144 ÷ 13) of 2400% = ?
65% of 102 + 14 = ? – 20
? = √2704 ÷ (25% of 104) + 73
375% of 320 - 80% of 40 ÷ √256 = ?
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