Question

a dad expends 200 joules of work pushing a stroller up a hill. he produces 125 j of work. how efficient is he being?

Answer 1

The dad is being 62.5% efficient in pushing the stroller up the hill.

Step-by-step explanation:

The question asks about the efficiency of a dad pushing a stroller up a hill and how much work he does in terms of the energy he spends.

To determine his efficiency, you can use the formula:

Efficiency = (Useful Work Output / Total Energy Input) × 100%

In this case, the useful work output is 125 joules, and the total energy input is 200 joules.

So:

Efficiency = (125 J / 200 J) × 100% = 62.5%

Therefore, the dad is being 62.5% efficient in pushing the stroller up the hill.