to lift a load to roof, you apply 21 n of force to a pulley. the pulley applies 21 n of force to the load. what is the mechanica
1 answer:
Answer:
The mechanical advantage of the pulley is 1.
Explanation:
The mechanical advantage of the pulley is given as
Here, MA is represent for the mechanical advantage of the pulley, F is load for lift and f applied force.
Given F =21 N and f= 21 N.
Substitute the given values, we get
MA = 1.
Thus, the mechanical advantage of the pulley is 1.
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The question is incomplete. The complete question is :
A platypus foraging for prey can detect an electric field as small as 0.002 N/C.
-To give an idea of sensitivity of the platypus's electric sense, how far from a +80nC point charge does the field have this magnitude?
Solution :
Given electric field, E = 0.002 N/C
Charge, Q = + 80 nC
or
R = 600 m
This is the distance of the charge from the point of observations.