Question

Match the phrase with word please help!

Phrases:

1.) The amount of work done when jerry carries a box from his house to the moving truck . He exerts a force of 35 N while carrying the box 4 meters

2.) The power resulting from 420 Nm of work being completed in 3 seconds

3.) The amount of work done when Fido carries his toy from the backyard to his crate. He exerts a force of 1.2 N over a distance of 15 m

4.) The power resulting from 120 Nm of work being completed in 20 seconds


A.) 140 joules

B.) 140 Newton-meters

C.) 6 joules

D.) 6 Newton-meters

Answer 1

1-B, 2-A, 3-D, 4-C

Step-by-step explanation:

1. The force exerted is, F = 35 N

Distance the box is moved, d = 4 m

So the amount of work done is, W = F x d

= 35 x 4

= 140 Newton-meters

2. Work done, W = 420 Nm

Time, T = 3 seconds

Therefore, the power required is,

`$P=(W)/(T)$`

`$P=(420)/(3)$`

= 140 joules

3. The force exerted is, F = 1.2 N

Distance the box is moved, d = 5 m

So the amount of work done is, W = F x d

= 1.2 x 5

= 6 Newton-meters

4. Work done, W = 120 Nm

Time, T = 20 seconds

Therefore, the power required is,

`$P=(W)/(T)$`

`$P=(120)/(20)$`

= 6 joules