Topic E - Circular motion

Question 1

what is circular motion?

Answer 1

the motion of an object along the circumference of the circle is known as circular motion.

Question 2

what is frequency?

Answer 2

it is the number of rotations in a second.

Question 3

what is time period?

Answer 3

time period is the amount of time it takes for one full rotation or oscillation.

Question 4

what is the equation of time period?

Answer 4

t = 2π / ω

Question 5

what is angular displacement (θ) ?

Answer 5

Angular displacement is the angle swept between the initial and final position of an object moving in circular motion.

Question 6

what is the SI unit of angular displacement?

Answer 6

rad

Question 7

what is angular velocity (ω) ?

Answer 7

angular velocity is the rate of change of angular displacement.

Question 8

what is the equation of angular velocity?

Answer 8

angular velocity = angular displacement/ time

angular velocity = Δθ /Δt

Question 9

what is the SI unit of angular velocity?

Answer 9

rads^-1

Question 10

what is instantaneous velocity?

Answer 10

instantaneous velocity is the velocity in a particular instance.

Question 11

what is the equation for instantaneous velocity?

Answer 11

V = r x ω

Question 12

what is centripetal acceleration?

Answer 12

consider an object moving in an circular motion. even through the speed remains constant, the direction continuously changes. there by the velocity changes as a result the object will be accelerating. this acceleration is known as centripetal acceleration.

Question 13

what is the equation of time period?

Answer 13

t = 2π / ω

Question 13

what is the equation of centripetal acceleration?

Answer 13

a = Δω / Δ t

Question 14

what is the equation of centripetal force?

Answer 14

f = m a

f = m . v^2 / r
f = m . r ω^2