A-LEVEL PHYSICS: 11.1.1: Rotational Motion (SaveMyExams)

Question 1

a rigid rotating body can be described using the following properties: (3)

Answer 1

-angular displacement (θ)

-angular velocity (ω)

-angular acceleration (α)

Question 2

angular displacement (θ):

Answer 2

the change in angle through which a rigid body has rotated relative to a fixed point

Question 3

angular displacement is measured in…

Answer 3

radians

Question 4

equation linking linear displacement to angular displacement:

Answer 4

s = rθ

length of arc
(linear distance travelled along a circular path)

=

radius * angular displacement

Question 5

angular velocity (ω):

Answer 5

the rate of change of angular displacement with respect to time

Question 6

angular velocity is measured in…

Answer 6

rad s^-1

Question 7

ω = …

Answer 7

∆θ / ∆t

Question 8

equation linking linear velocity to angular velocity:

Answer 8

v=rω

ω=v/r

r=v/ω

Question 9

angular acceleration (α):

Answer 9

the rate of change of angular velocity per unit time

Question 10

α = …

Answer 10

∆ω / ∆t

Question 11

equation linking linear acceleration to angular acceleration:

Answer 11

α = ∆ω/∆t = ∆v/r∆t = a/r

α = a/r

Question 12

area under ω-t graph:

Answer 12

θ

Question 13

area under α-t graph:

Answer 13

ω

Question 13

gradient of θ-t graph:

Answer 13

ω

Question 14

gradient of ω-t graph:

Answer 14

α