Question

Friends I carry a doubt, can u plz clarify.
In a machine VR =de/dl.
But how could we cancel out the time t. We dont know if friction acts on the body, the time taken for displacement of effort should be more than that taken for displacement of load
But still also how could we assume t to be equal in that case​

Answer 1

Answer:

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

$For a machine of a given design, due to friction and weight of the moving parts of machine, the velocity ratio does not change, but both mechanical advantage and the efficiency decreases.</p><p>Velocity Ratio :</p><p>V.R=VLVE</p><p></p><p></p><p>$

Answer 2

Answer:

blablablablablabla basa