If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is________________?
Correct answer: B. At the lowest point
- A. At the highest point
- B. At the lowest point
- C. At any point during motion
- D. At the point where gravity is not acting
Explanation
At the lowest point of a vertical circle, the stone has its greatest speed because it has lost the most gravitational potential energy. The string tension must then provide the centripetal force as well as support the weight, so it is greatest there and the string is most likely to break. Students may choose the highest point because the stone is farthest from the centre, but its speed and required tension are smaller there.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Angular and Linear Quantities
Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
Practise Rotational and Circular Motion
521 free Rotational and Circular Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Angular and Linear Quantities questions
The planet nearest to the earth is______________?
A satellite moving around the earth constitutes______________?
Minimum number of communication satellites required to cover the whole earth is______________?
What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ?
In an angular motion, Newton's second law of motion is_____________?
A cyclist cycling around a circular racing track skids because_____________?