Question 129: Work, Energy and Power & Circular Motion

Question

A clock has a continuously moving second's hand of 0.1 m length. The average acceleration of the
tip of the hand (in units of ms
–2
) is of the order of :

Accepted Answer

R = 0.1 m
$\omega $ = ${{2\pi } \over T}$ = ${{2\pi } \over {60}}$ = 0.105 rad/sec
a = ${\omega ^2}R$
= (0.105)
2
(0.1)
= 0.0011
= 1.1 $ 	imes $ 10
-3
Average acceleration is of the order of 10
Ã¢ÂÂ3
.

Answer

10
-3

Answer

10
-1

Answer

10
-2

Answer

10
-4

Work, Energy and Power & Circular Motion

A clock has a continuously moving second's hand of 0.1 m length. The average acceleration of the tip of the hand (in units of ms –2 ) is of the order of :

Choose the correct answer: