Which of the following can a machine not increase?



a. work



b.speed



c.force



d.torque

a. Work





Machines transfer work (i.e. energy to/from different forms), but don't increase it. The amount of work that comes out of a machine is the same work that went into it, just in a different form.

Answer is A, machines cant perform without the work

Work





a machine only changes one form of energy to another, it doesn't create or destroy it

None of the above.

Which of the following can a machine not increase?



a. work



b.speed



c.force



d.torque