14) Along what other vector is centripetal force located? A. Tangential velocity

Question

14) Along what other vector is centripetal force located? A. Tangential velocity B. Angular acceleration C. Tangential acceleration D. Centripetal acceleration 15) Which of the following is not an example of centripetal force? A. Friction between tires and a road when going around a curve B. The tension in a rope that is being swung around in a circle C. The bars applying a force to a person on a merry-go-round motion The force that pushes a person to D. The force that keeps planets in E. the outside of a turn 16) The acceleration vector that points toward in velocity is known as which of the A. Tangential acceleration C. Centripetal acceleration the center of rotation and causes a change following? B. Tangential speed D. Centripetal velocity 17) The angular velocity positive when an object is rotating in what direction? A. Clockwise B. Counter clockwise C. Opposite D. Need more information 18) Every particle in the Universe attracts every other particle with a force that is directly proportional to the product of their masses in inversely proportional to the square of the distance between them is known as: A. Centripetal force B. Kepler's law of gravitational masse C. Newton's universal law of gravitation D. Newton's Force law

Explanation / Answer

Answers:

14. D

15. E

16. C

17. B

18. C

14: Since F = m a

therefore the direction of centripetal force is same as centripetal acceleration.

15. The force that pushes the person outside is an example of centrifugal force.

16. Centripetal acceleration is due to the change in direction of velocity when a particle is moving in circle. Since particle mooves in a circle, changes direction at each point. Even if velocity of particle is constant in magnitude then also in a circular motion direction of the moving particle changes and hence this change in velocity makes an acceleration known as centripetal acceleration.

17. Angular velocity is taken positive when object rotating counterclockwise. This is the conventional direction.

18. This is the inverse square law and is given by Newton, Know as Newton's Universal law of gravitation.

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