Question

a table has its minute hand 4.0 cm long average velocity of the tip of the minute hand between 6:00 a.m. to 6:30 a.m. and 6:00 a.m. to 6:30 p.m. will be respectively be ​

Answer 1

Answer:

AVERAGE SPEED = 4.4 × 10-³ cm/s

AVERAGE VELOCITY = 1.8 × 10-⁴ cm/s

Step-by-step explanation:

given that,

the length of the minute hand = 4 cm

from 6:00 am to 6:30 am

the minute hand will cone just opposite to the earlier position.

We know that,

Average velocity = displacement/time

here,

displacement = 2 × 4 = 8 cm

given time,

= 30 minutes

= 30 × 60 seconds

= 1800 seconds

Average velocity = 8/1800

= 44.444 × 10-⁴

= 4.4 × 10-³ cm/s

now,

from 6:00 am to 6:30 pm

displacement will same

and time = 12 hours + 30 minutes

= 12(3600) + 30(60) seconds

= 43200 + 1800

= 45000 seconds,

Average velocity = 8/45000

= 0.0001777

= 0.000178

= 1.78 × 10-⁴ cm/s

so,

_______________

AVERAGE SPEED

= 4.4 × 10-³cm/s

AVERAGE VELOCITY

= 1.8 × 10-⁴ cm

Answer 2

HeRe Is Your Ans ⤵

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Ans :-

➡Average Speed = 0.00698 cm/s

➡Average Velocity = 0.0044 cm/s

Average velocity and average speed between 6 am to 6:30 pm is same as that of 6 am to 6:30 am

Given :-

➡Length Of Minute Hand = 4.0 Cm

To Find :-

➡Average Speed = ?

➡Average Velocity = ?

Solution :-

Between 6 am to 6:30 am

➡Average speed = Total distance ÷ Time

➡πr ÷ (30 × 60 seconds)

➡4π ÷ 1800

➡0.00698 cm/s

➡Average velocity = Total displacement ÷ Time

➡2r ÷ (30 × 60 seconds)

➡8 ÷ 1800

➡ 0.0044 cm/s

Average velocity and average speed between 6 am to 6:30 pm is same as that of 6 am to 6:30 am

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