Question

Mahmood is lifting a bag of cement. He uses 5 N of force to lift the bag 20 meters. If Mahmood uses a machine to decrease the distance to 10 meters, he will ___.

decrease the amount of work done
increase the amount of work done
decrease the amount of force needed
increase the amount of force needed

Answer 1

Decrease

Step-by-step explanation:

Answer 2

Answer;

Decrease the amount of force needed

Explanation;

• A machine does not decrease the amount of work that is done. Instead, a machine changes the way in which work is done. Recall that work is the use of force to move an object.
• Machines are used to make work easier by reducing the force needed. They do not decrease the amount of work.
• Machines make work easier to do by decreasing the force required by increasing the distance over which the work is done.