Question

The minutes hand is 7cm long.calculate the distance covered and the displacement of minute hand of clock from 9 AM to 9.30 AM. The clock is perfectly circular with a radius of almost 7 cm.

Answer 1

Answer:

Explanation:Answer:

The displacement is 14 cm and the distance is 21.98 m approximately taken as 22 m.

Explanation:

The clock has the minute hand with the length of 7 cm which moves from 9 am to 9 : 30 am, the distance covered and the displacement covered will be calculated as follows –

The displacement is the measure of the shortest distance between the two points of travel irrespective of the path followed.

Here, the minute hand initially is at 9 : 00  

And finally at 9 : 30  

So the shortest distance will the twice of the length of the minute hand as it fully stretches on either side of the clock.

Displacement = twice length of minute hand

Displacement = 14 cm

Distance is the measure of actual length covered in the total journey.

Here, distance is half of the circumference of the clock as travelled for 30 minutes.

Distance = circumference of half clock

Distance = circumference of half circle

Distance = 3.14 7

Distance = 21.98  m

Or Roughly Distance = 22 m

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