Question

the second hand of a clock is 10.0 cm long. it goes round once every 60 s. (a) what is the average speed of the tip of the second hand take 3.14​

Answer 1

Given:

The length of second hand = 10.0 cm

Time taken to complete one round = 60 seconds

To find:

Average speed of the tip of second hand = ?

Solution:

If we observe closely, the second hand's tip is making a circle whose radius is equal to the length of second hand.

And Distance traveled by the second hand is along the circular edge of the clock.

Formula for Average Speed is given as:

$\text{Average Speed = }\dfrac{\text{Total Distance traveled}}{\text{Total Time Taken}}$

Here, Total distance traveled is equal to the circumference of the circle with radius 10 cm.

Time taken is 60 seconds.

Circumference of a circle = $2\pi r$

Where $r$ is the radius of circle.

Putting r = 10 cm the formula:

Total distance traveled = $2\times 3.14 \times 10 = 62.8\ cm$

Now,

$\text{Average Speed = }\dfrac{62.8}{60}\\\bold{Average\ Speed = 1.05\ cm/s}$

So, average speed of the tip of second's hand is: 1.05 cm/s

Answer 2

Answer:

check above its helpful than 1st answer