Question

In physics, work is defined as

F
⋅
D
F⋅DF, dot, D where
F
FF is the force applied over a distance of
D
DD.
A box is dragged across
20
2020 meters with a force of
60
6060 Newtons, which are
kg
⋅
m
s
2
s
2

kg⋅m
​
start fraction, start text, k, g, end text, dot, start text, m, end text, divided by, start text, s, end text, squared, end fraction.
What calculation will give us the work done, in Joules (which are
kg
⋅
m
2
s
2
s
2

kg⋅m
2

​
start fraction, start text, k, g, end text, dot, start text, m, end text, squared, divided by, start text, s, end text, squared, end fraction)?
Choose 1 answer:
Choose 1 answer:




30 PTS!!!

Answer 1

20 times 60

Explanation:

answer on khan

Answer 2

9514 1404 393

Answer:

A. 20·60

Explanation:

I often like to keep the units with the numbers, especially in Physics problems. This helps make sure the math is being done correctly.

W = F·D

W = (60 N)(20 m) = 60·20 N·m = 60·20 (kg·m/s²)(m) = 60·20 kg·m²/s²

= 20·60 J