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Standard XII
Physics
Earth as Inertial Frame
An 80 kg ma...
Question
An
80
k
g
man stands on a spring balance in an elevator. When it start to move, the scale reads
700
N
. What is the acceleration of the elevator?
(
g
=
10
m
s
−
2
)
Open in App
Solution
Reading of spring balance
=
m
(
→
g
−
→
a
)
where,
→
a
is acceleration of elevator
Here,
m
(
→
g
−
→
a
)
=
700
N
⇒
80
(
10
−
a
)
=
700
N
⇒
10
−
a
=
70
8
⇒
a
=
10
−
8.75
=
1.25
m
/
s
2
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