An ice skater with a mass of 52.5 kg is gliding across a smooth lake with a speed of 2.25 m/s when she hits a spot of ice covered with snow. After a time of 7.55 s she has slowed to a stop. Using your knowledge of momentum, determine the magnitude of the average force of friction acting on the ice skater while she slows to a stop.

The magnitude of the average force of friction acting on the ice skater while she slows to a stop is 15.65 N

Explanation:

Given;

mass of the ice skater, m = 52.5 kg

speed of the ice skater, u = 2.25 m/s

time for her gliding, t = 7.55 s

To determine the magnitude of the average force of friction acting on the ice skater while she slows to a stop, we apply Newton's second law of motion;

F = ma

where;

F is average force of friction acting on the ice skater

v is the final speed speed of the ice skater = 0

u is the initial speed of the ice skater

t is time

Thus, the magnitude of the average force of friction acting on the ice skater while she slows to a stop is 15.65 N

d. platinum would have the greatest temperature increase because it has the lowest specific heat.

because if the tool that you are using is not balanced it there would be false mass.