further mechanics and thermal physics

Question 1

what causes centripetal acceleration

Answer 1

is caused by a centripetal force of constant magnitude that also acts perpendicular to the direction of motion

Question 2

what is angular displacement, θ, of a body in circular motion

Answer 2

the change in angle, in radians, of a body as it rotates around a circle

Question 3

how do you calculate angular displacement

Answer 3

Δ θ = distance travelled around the circle / radius of the circle

Question 4

what is the definition of a radian (rad)

Answer 4

the angle subtended at the center of a circle by an arc equal in length to the radius of the circle

Question 5

degrees in radians

360
270
180
90

Answer 5

degree — radians
360 —— 2 π
270 —— 3 π /2
180 —— π
90 —— π /2

Question 6

what is the formula for one complete rotation

Answer 6

v= 2 π r F

Question 7

what is angular speed

Answer 7

the rate of change in angular displacement with respect to time

Question 8

what is the formula for angular speed

Answer 8

w = △ θ/ △t

Question 9

formula for angular frequency

Answer 9

angular frequency= number of rpm’s/ 60

Question 10

what is the equation for linear velocity

Answer 10

v = rw