A stack of books whose true weight is 165 N is placed on a scale in an elevator. The scale reads 165 N. From this information alone, can you tell whether the elevator is moving with a constant velocity of 2 m/s upward, is moving with a constant velocity of 2 m/s downward, or is at rest

Explanation:

Given

The true weight of books is

Weight measured in the elevator is also

True weight=measured weight

Therefore, we can say that elevator is not accelerating

Had the lift is accelerating upwards, the measured weight would be more than the true weight.

Thus, it cannot be said with certainity that the lift is moving upward, downward, or at rest.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.