Question

Which of the following are true of machines? Pick all that apply.

A. The output force is the amount of force exerted on the machine.
B. Machines cannot increase the total work done.
C. A machine cannot change the direction of the input force.
D. A machine can decrease the amount of input force needed.

Answer 1

Machines cannot increase the total work done. (B)

BUT . . .

A machine can decrease the amount of input force needed. (D)