20) A heavy sled and a light sled, both moving horizontally with the same speed,

Question

20) A heavy sled and a light sled, both moving horizontally with the same speed, suddenly slide onto a rough patch of snow and eventually come to a stop. The coefficient of kinetic friction between the sleds and the rough snow is the same for both of them. Which of the following statements about these sleds are correct? A) Both sleds will slide the same distance on the rough snow before stopping. B) The heavy sled will slide farther on the rough snow than the light sled. C) The light sled will slide farther on the rough snow than the heavy sled. D) The friction from the snow will do the same amount of work on both sleds.

Explanation / Answer

C) The light sled will slide farther on the rough snow than the heavy sled.

D) The friction from the snow will do the same amount of work on both sleds.

These two are true because

Due to mass, lighter sled will have greater velocity than heavy sled for same KE

But frction(opposition) is more on the heavier mass so its stops soon

Thus lighter sled moves larger distance

If it is in terms of energy, change of Energy is same for both

So here C and D are true

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