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

1,350,000Joules

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

the answer is 3.1 his answer is wrong mines is right

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.