Question

*Physical Science* *E2020* *Unit Test*

Four students were loading boxes of food collected during a food drive. The force that each student exerted while lifting and the distance each box was lifted are listed in the table.

| Student | Force(N) | Distance(m) |
|-------------------|--------------------------|--------------------------|
| Chet | 50 | 1.0 |
|-------------------|--------------------------|--------------------------|
| Mika | 40 | 2.0 |
|-------------------|--------------------------|--------------------------|
| Sara | 30 | 1.5 |
|-------------------|--------------------------|--------------------------|
| Bill | 60 | 0.5 |
|__________|______________|_____________ |

Which lists the students in order from the greatest amount of work done to the least? (Work: W = Fd)

A. Bill, Sara, Chet, Mika
B. Mika, Chet, Sara, Bill
C. Bill, Chet, Mika, Sara
D. Mika, Sara, Chet, Bill

Answer 1

i think its b

hope this helps

Answer 2

Answer:The correct answer is option B.

Explanation:

Work done is defined product of force applied on an object and the displacement of an object on applying of force.It is measured in Joules.

$W=Force\times Displacement$

1. Chet

Work done = $50 N\times 1.0 m= 50.0 Joules$

2. Mika

Work done = $40 N\times 2.0 m= 80.0 Joules$

3. Sara

Work done = $30 N\times 1.5 m= 45.0 Joules$

4.Bill

Work done = $60 N\times 0.5 m= 30.0 Joules$

The greatest work was done by Mika and least work was done by BIll. The order from the greatest amount of work done to the least.

Mika>Chet>Sara>Bill.

Hence ,the correct answer is option B.