Question

A minute hand of a wall clock is 10cm long. Find distance covered and displacement between 10 am to 10:30 am

Answer 1

Answer:

the displacement of the minute hand =  πr cm

average speed = 50 km/hr

Explanation:

Minute hand will works as radius and make a circle of radius 10cm

Displacement is given by=2r=20cm

Distance is given by =πr=22/7x10=3.14x10=31.4cm

first distance covered by speed=40km/hr

second distance covered by speed=60km/hr

Average is given by=s1+s2

                                2

60+40    =50km/hr

2

Answer 2

Answer:

Explanation:

distance travelled the minute hand=half the clock⇒2πr/2⇒πr

displacement of minute hand =2r

where r is the radius of the clock⇒minute hand length

distance=10πcm

displacement=20cm