Let denote the angular displacement of a simple pendulum oscillating in a vertical plane. If the mass of bob is m. The tension in the string is mg cos
3. at extreme
4. at mean position
A particle is moving in a vertical circle. The tension in the string when passing through two positions at anele of 30 and 60 from vertical (the lowest position) are respectively, then:
4. Tension in the string always remains the same.
What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?
A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is 20m. The speed of the car at the top of the hill is between
1. 14m/s and 15m/s
2. 15m/s and 16m/s
3. 16m/s and 17m/s
4. 13m/s and 14m/s