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A particle is projected with a velocity u making an angle θ  with the horizontal. The instantaneous power of the gravitational force

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Important Questions on Work, Energy and Power

EASY
KCET (UG)
IMPORTANT
Physics Crash Course KCET (UG)>Chapter 8 - Work, Energy and Power>Exercise 1>Q 108
A bucket tied at the end of a 1.6 m long string is whirled in a vertical circle with constant speed. What should be the minimum speed so that the water from the bucket does not spill, when the bucket is at the highest position :- (Take g=10 m sec-2)
EASY
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IMPORTANT
Physics Crash Course KCET (UG)>Chapter 8 - Work, Energy and Power>Exercise 1>Q 109
A mass m is attached to the end of a rod of length l. The mass goes along a vertical circular path with the other end hinged at its centre. What should be the minimum velocity of the mass at the bottom of the circle so that the mass completes the circle?
EASY
KCET (UG)
IMPORTANT
Physics Crash Course KCET (UG)>Chapter 8 - Work, Energy and Power>Exercise 1>Q 110
For a particle moving in a vertical circle,
EASY
KCET (UG)
IMPORTANT
Physics Crash Course KCET (UG)>Chapter 8 - Work, Energy and Power>Exercise 1>Q 111
If the overbridge is concave instead of being convex, the thrust on the road at the lowest position will be,
EASY
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IMPORTANT
Physics Crash Course KCET (UG)>Chapter 8 - Work, Energy and Power>Exercise 1>Q 112
A particle is moving in a vertical circle. The tensions in the string when passing through two positions at angles 30° and 60° from vertical (lowest position) are T1 and T2 respectively then
MEDIUM
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IMPORTANT
Physics Crash Course KCET (UG)>Chapter 8 - Work, Energy and Power>Exercise 1>Q 113
A stone tied to a string of length L is whirled in a vertical circle with the other end of the string at the center. At a certain instant of time, the stone is at its lowest position, and has a speed u. The magnitude of the change in its velocity as it reaches a position where the string is horizontal is (assume g as acceleration due to gravity)
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IMPORTANT
Physics Crash Course KCET (UG)>Chapter 8 - Work, Energy and Power>Exercise 1>Q 114
The tension in the string revolving in a vertical circle with a mass m at the end when it is at the lowest position is
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Physics Crash Course KCET (UG)>Chapter 8 - Work, Energy and Power>Exercise 1>Q 115
A simple pendulum oscillates in a vertical plane. When it passes through the mean position, the tension in the string is 3 times the weight of the pendulum bob. What is the maximum angular displacement of the pendulum of the string with respect to the vertical?