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UPSEE Solved Model Paper 7
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© examsnet.com
Question : 12
Total: 150
A wall clock has a 4 cm long minute hand. The average velocity of the tip of the hand reaching 0600 hrs to 1830 hrs is
2.4 x
10
−
4
cms
−
1
1.8 x
10
−
4
cms
−
1
5 x
10
−
5
cms
−
1
3.5 x
10
−
3
cms
−
1
Validate
Solution:
Figures below show the position of minute hand of the clock
S o , the displacement of the minute hand, s = 8 cm
Time interval between 0600 hrs and 1830 hrs is 12 hr 30 minutes, i.e. 45000 seconds. Thus,
Average velocity =
Total
displacement
Total
time
taken
⇒
v
avg
=
8
cm
4500
s
=
1.8
×
10
−
4
cm/s
Hence, option 'B' is correct.
© examsnet.com
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