Question

A machine in which V.R is 4 and M.A is nearly 4. If the friction of the machine increases,​

Answer 1

Explanation:

For a machine of a given design, due to friction and weight of the moving parts of machine, the velocity ratio does not change, but both mechanical advantage and the efficiency decreases.

Velocity Ratio :

V.R=

V

L

V

E

Answer 2

If the friction of the machine increases, the velocity ratio does not change, but both the mechanical advantage and the efficiency decrease.

• The velocity ratio of a machine of a particular design does not vary owing to the friction and weight of the machine's moving elements, but both mechanical advantage and efficiency decline.
• This is because the velocity ratio is the ratio of the distance traveled by any portion of a machine to the distance traveled by the driving part at the same time.
• The mechanical force is the output force divided by the input force.