Brain teaser 7
Classical Mechanics
Level
3
⏰🕜🕑🕝🕒🕠🕓🕑🕓🕠🕞🕠🕞🕑🕞🕠🕞🕓
A table clock has its minute hand 4.5 cm long. The magnitude of the average velocity of the tip of minute hand when it travels from 6.00 a.m. to 6.30 p.m. is:------
0.0157 cm/s
0.3 cm/s
0.005 cm/s
0.0002 cm/s
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1 solution
Displacement is at 180° therefore d=9cm...and time taken is 12 hours 30min so d/s we get the answer...bingo