Physics - Study Mode

[#1076] For which one of the following does the centre of mass lie outside the body?
Correct Answer

(C) A ring

Explanation

Solution: The centre of mass lie outside the body for a ring.

[#1077] When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is
Correct Answer

(B) Above a certain minimum value irrespective of amount of water in the pail

Explanation

Solution: When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is great enough. At every point in the circle the water tries to fall vertically out due to the force of gravity g but also tries to move in a straight line due to its circular motion.

[#1078] Fat can be seperated from milk in a cream seperator because of :
Correct Answer

(D) Centrifugal Force

Explanation

Solution: A separator is a high-speed centrifuge that acts on the principle that cream or butterfat is lighter than other components in milk. Fat can be separated from milk in a cream separator because of Centrifugal forces.

[#1079] In case of uniform circular motion, the acceleration is
Correct Answer

(A) Variable in magnitude but constant in direction

Explanation

Solution: In case of uniform circular motion, the acceleration is variable in magnitude but constant in direction.

[#1080] Which of the following terms is not used in the field of physics?
Correct Answer

(D) Stock value

Explanation

Solution: Stock value is not used in the field of physics.