Raising the weight of the body on toes is an example for:
Class I lever
Class II lever
Class III lever
None of these
For an ideal machine, the ratio of mechanical advantage (MA) to the velocity ratio (VR) is
greater than 1
less than 1
equal to 1
depends on the value of load
Efficiency of an ideal machine is
50%
100%
90%
75%
Class I lever is that in which
fulcrum is between the load and effort
load is between the fulcrum and effort
effort is between the load and fulcrum
fulcrum , load and effort are at one point
A crowbar 2 m long is pivoted about a point 10 cm from its tip. Mechanical advantage of crowbar is
19
18
12
10
The opposing force to be overcome by a machine is:
Effort
Load
Fulcrum
Both a and b
The correct relationship between the voltage ratio (VR) distance moved by load (dL) and distance moved by effort (dE) is.
VR = dL + dt
VR = dE x dL
Claw hammer is an example for:
Both Class I & II lever
Nodding action of head is an example of :
The mechanical advantage of Class III lever is always:
1
