NEET Physics Question - Thermal Physics

Assertion (A): An ice skater can slide over ice smoothly if the skate blades are sharp.

Reason (R): Melting point of ice decreases with increase in pressure.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Sharp blades increase pressure, lowering ice's melting point (regelation). A thin water layer forms, reducing friction, allowing smooth sliding. Thus, R correctly explains A.

Rankers Physics

Ice Skater and Pressure

Solution:

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