Question

what is mechanical advantage (ma)?
the transfer of energy by a force acting over a distance.
an internal force within a material per unit area that resists external forces.
how much a machine multiplies the effort force when it is doing work. the factor by which a machine multiplies an input force.
the rate of change of velocity.
points: 2
question 22 - multiple choice
which wheel and axle image below has the effort at wheel?

Explanation:

Mechanical Advantage (MA) is defined as how much a machine multiplies the effort force when it is doing work. It is the factor by which a machine multiplies an input force. The first option describes work (energy transfer by a force over a distance). The second option describes stress (internal force per unit area). The fourth option describes acceleration (rate of change of velocity).

Answer:

How much a machine multiplies the effort force when it is doing work. The factor by which a machine multiplies an input force.