Question

An avalanche takes place when ice and snow move down a slope with great speed. What effect does friction have on its rate of movement? A. Friction causes the avalanche to move rapidly. B. Friction creates a curved surface that decreases the speed. C. The speed of the avalanche decreases with increased friction. D. The speed of the avalanche increases with increased friction. E. Friction does not have any effect on the avalanche.

Answer 1

D. The speed of the avalanche increases with increased friction.

Step-by-step explanation:

Answer 2

The answer is; D

The friction causes the ice at the base of the avalanche to melt into water (also due to the pressure of the weight of the ice-rock above). The melted water acts as a lubricant hence reducing the drag/friction in the avalanche movement. This increases its speed down the slope hence making it more destructive.