Question

A girl on a sled coasts down a hill. her speed is 7.0m/s when she reaches level ground at the bottom. the coefficient of kinetic friction between the sled's runners and teh hard, icy snow is 0.050, and the girl and sled together weigh 645n. how far does the sled travel on the level ground before coming to rest?

Answer 1

The distance traveled by the sled can be determined using the equation: W_net = ΔKE. The initial kinetic energy of the sled can be calculated using the equation: KE = 0.5 * m * v^2. Plugging in the given values, we can solve for the distance traveled by the sled on the level ground.

Step-by-step explanation:

The distance traveled by the sled can be determined using the equation:

W_net = ΔKE

Where W_net is the net work done on the sled, and ΔKE is the change in kinetic energy of the sled. Since the sled comes to rest on level ground, the change in kinetic energy is equal to the initial kinetic energy of the sled.

The initial kinetic energy of the sled can be calculated using the equation:

KE = 0.5 * m * v^2

Where m is the mass of the sled and v is its speed. Plugging in the given values, we have:

KE = 0.5 * 645 * (7.0)^2

Using the above equation, we can solve for the distance traveled by the sled on the level ground.