A man stands on a spring scale placed in a lift. The lift descends at constant velocity. As a result, the scale reads a weight
a
greater than the weight of the man
b
the same as the weight of the man
c
of zero
d
less than the weight of the man
e
greater than the weight of the man by 1kg
Explanation
Correct Option
bNo explanation available
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Discussions (14)
Craig Duffy
9 years ago
is simple...
R= W - F
= mg-ma
where R is the reaction force, W is the weight and F is the force exerted on d lift.
since velocity is constant, acceleration equals zero
R = mg - m×0
R = mg
that is, reaction force equal weight.
Shemasane19
4 years ago
When a moves at constant velocity in a light the weight or reaction is W= mg,
Recall that weight = mass× gravity
Therefore, mg=mg
Which simply means SAME WEIGHT ✓ BBB✓✓✓
