Around 750 to 1,500.
Hope I helped!
Answer:

Explanation:
Work is the product of force and distance.

The force is 500 Newtons and the couch is raised 12 meters above the ground.
Substitute these values into the formula.

Multiply.

- 1 Newton meter is equal to 1 Joule.
- So, our answer of 6000 N*m equals 6000 J

The work done to move a 500 Newton couch 12 meters is <u>6000 Joules</u>. Therefore, choice D is correct.
B. The bus is going forward and suddenly stopped.
I am not 100% sure, more like 90% sure, that the answer is A.
Hope this helps! :)
Answer:
The force is 
Explanation:
From the question we are told that
The mechanical advantage is
The load is
The height is 
Generally mechanical advantage is mathematically represented as

Here E is the force that must be applied to move the piano
=> 
=> 
=> 