Question

A student pushes a 40-N block across the floor for a distance of 10 m. How much work was done to move the block? 4 J 40 J 400 J 4,000 J.

Answer 1

400 J

Step-by-step explanation:

This is the correct answer for k12

Answer 2

`\boxed {\boxed {\sf 400 \ J}}`

Step-by-step explanation:

Work is a force that causes the displacement of an object. It is the product of force and displacement.

`W=Fd`

The force is 40 Newtons and the displacement is 10 meters.

• F=40 N
• d=10 m

Substitute the values into the formula.

`W= 40 \ N * 10 \ m`

Multiply.

`W= 400 \ N*m`

Convert the units. 1 Newton meter is equal to 1 Joule, so our answer is equal to 400 Joules.

`W= 400 \ J`

400 Joules of work was done to move the block.