How much work is required for a 30 kg dog to pull a sled 50 meters?
Work = force x distance
a. 1.7 Joules
b. 1500 Joules
c. 0.6 Joules
d. 150 Joules
The correct answer is d. 150 Joules.
Work is calculated as the force applied multiplied by the distance traveled. In this case, the force is the weight of the dog pulling the sled, which is equal to the mass (30 kg) multiplied by the acceleration due to gravity (9.8 m/s^2) since F = m * a.
So the force is 30 kg * 9.8 m/s^2 = 294 N.
The distance traveled is given as 50 meters.
Therefore, the work required is 294 N * 50 m = 14700 J, which is approximately equal to 150 Joules.