Question

Joe used a 750 watt 1/2" cordless drill to put together a bookcase. Calculate the work involved in this thirty minute process.

A)
2.4 J


B)
60 J


C)
22,500 J


D)
1,350,000 J

Answer 1

750W 30mins...750x30x60 joules ... 75000x18 ... about 1,500,000j

D

Answer 2

1,350,000Joules

Step-by-step explanation:

Work done by Joe in 30minutes can be calculated using the formula

Work done = power × time

Given power = 750watts

Time = 30minutes

Time = 30×60 = 1800secs

Workdone = 750×1800

Work done by Joe= 1,350,000Joules