Practice Test | Kullabs.com
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VR = l/h
VR =2r/P
VR = R/r
Vr = Ld/Ed
• ### Which one of the following is same in every simple machine?

Effort
Velocity Ratio (VR)

VR = h/l
VR = l/t
VR = l/h
Vr = Ld/Ed

50%
1%
99%
100%

motioned
motionless
frictionless
gravityless
• ### The resistive force to be overcome is called______.

effort
mechanical energy
• ### The value of MA is always less than VR because:

Effort decreases due to friction.
Some of the effort is increased due to friction
Load is equal to effort due to no friction.
Load increases due to change in speed.