Question

two fathers run an 8 km race. One man pushes his 88 N son and a 44 N stroller during the race but the other does not. How much work does the man who pushed his son in the stroller performed during the race? Compare this to the work performed by the man who did not push his son in the stroller.

Answer 1

The work done by the man who pushed his son in the stroller is 1,056,000 J, while the man who did not push his son in the stroller did no work.

Step-by-step explanation:

To calculate the work done by a man who pushes his son in a stroller, we need to use the formula: work = force x distance. In this case, the force is the sum of the force applied to the son (88 N) and the force applied to the stroller (44 N), which is a total of 132 N. The distance is the 8 km race, which is 8000 m.

So, the work done by the man who pushed his son in the stroller is:

work = (force) x (distance) = (132 N) x (8000 m) = 1,056,000 Nm = 1,056,000 J

On the other hand, the man who did not push his son in the stroller does not have any additional force to consider, so his work is simply the force required to run the race times the distance:

work = (force) x (distance) = (0 N) x (8000 m) = 0 J