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Chapter 7: 16OQ (page 177)

An ice cube has been given a push and slides without friction on a level table. Which is correct? (a) It is in stable equilibrium. (b) It is in unstable equilibrium. (c) It is in neutral equilibrium. (d) It is not in equilibrium.

Short Answer

Expert verified

The correct option is (c): It is in neutral equilibrium.

Step by step solution

01

Frictionless motion 

If two bodies in contact with each other move relative to each other and the values of friction between both bodies are zero, the motion of the bodies is said to be frictionless motion.

In the frictionless motion between two bodies in contact, there are no energy losses; the acceleration value of the body is zero.

02

Equilibrium of ice cube 

It is givenan ice cube resting on a level is given a push and slides without friction on the table. Since there is no friction between the ice cube and the table surface, the ice cube moves at a constant speed on the table surface.

The value of the speed of the ice cube is constant, so there is no acceleration of the ice cube. It means that the ice cube never returns to its original position, so the ice cube is in the neutral equilibrium condition.

Hence, the correct option is (c): It is in neutral equilibrium.

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Most popular questions from this chapter

When a 4kg object is hung vertically on a certain light spring that obeys Hooke’s law, the spring stretches 2.5cm. If the 4kg is removed,

(a) how far will the spring stretch if a 1.5kg block is hung on it?

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