A 10-kg dog is runnng with a speed of 5.0 m/s. What is the minimum work required to stop the dog in 2.40 s?
A) 125 J
B) 100 J
C) 50 J
D) 75 J

Question

A  10-kg dog is runnng with a speed of  5.0 m/s. What is the minimum work required to stop the dog in  2.40  s?
A)  125 J
B)  100 J
C)  50 J
D)  75 J

Quizplus · Accepted Answer

The minimum work required to stop the dog can be calculated using the kinetic energy formula, which is $ \frac{1}{2}mv^2 $, where $ m $ is the mass of the dog and $ v $ is its velocity. Substituting the given values, $ \frac{1}{2} \times 10 \, \text{kg} \times (5.0 \, \text{m/s})^2 = 125 \, \text{J} $. The time factor does not directly affect the work needed to stop the dog, as work is a function of energy change, not time.

A 10-Kg Dog Is Runnng with a Speed of