Question

1) a) Identify the kind of motion in following cases?
i. A car moving with constant speed turning around
a curve.
ii. An electron orbiting around nucleus.
b)An artificial satellite is moving in a circular orbit of
radius 36,000 km. Calculate it's speed (km/hr) if it
takes 24 hours to revolve around earth?
c) Why is uniform circular motion called accelerated
Motion ?
2) a)Draw well labelled diagram of a plant cell?
b)Give functions of vacuoles and plastids in it?​

Answer 1

Answer:

Q1)

a)

i - Circular Motion

ii - Circular motion

b)Raidus = 36000km

Circumference = 2πr

= 2×22/7× 36000

= 22685.71429

Now here circumference = Distance of the path travelled ( orbit)

Now here circumference = Distance of the path travelled ( orbit)Also we know that the moon travels its orbit once in 24hrs

Now here circumference = Distance of the path travelled ( orbit)Also we know that the moon travels its orbit once in 24hrsThus Distance = 22685.71429

Now here circumference = Distance of the path travelled ( orbit)Also we know that the moon travels its orbit once in 24hrsThus Distance = 22685.71429Let Speed = x

Now here circumference = Distance of the path travelled ( orbit)Also we know that the moon travels its orbit once in 24hrsThus Distance = 22685.71429Let Speed = xTime taken = 24 hrs

Also, Speed = Distance/Time

Also, Speed = Distance/TimeThus, x = 22685.71429/24

Also, Speed = Distance/TimeThus, x = 22685.71429/24Speed = 9428.5714288 km/hr

Speed = 9428.66 km/hr (round off)

c)because the velocity changes as the direction is changing so the acceleration also occurs that's why it's called as accelerated motion.

Q2)

a)In the attachment

b)In the attachment

Explanation:

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