Lenard is preparing for a marathon by running around a 400 m long running track which is in the shape of a perfect circle. Lenard took 60 seconds to complete each lap.
(b) In the first 30 seconds:
(i) what was Lenard’s angular displacement?
(ii) what was Lenard’s angular velocity?
(c) Explain whether or not there is any acceleration occurring if Lenard is running at a constant speed around the running track.
Note: by answering, you are not doing my homework. I am studying for exams and this was a past exam question, thanks!

(b) In the first 30 seconds:
(i) what was Lenard’s angular displacement?
(ii) what was Lenard’s angular velocity?
(c) Explain whether or not there is any acceleration occurring if Lenard is running at a constant speed around the running track.
Note: by answering, you are not doing my homework. I am studying for exams and this was a past exam question, thanks!

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(1).
θ = (2π/T) t
θ = (2π/60)(30)
θ = π rad
(b).
ω = 2π/T
ω = 2π/60
ω = π/30 rad/s
(c)
Lenard only has centripetal acceleration,
a = ω² r
a = (π/30)² (400/(2π))
a = 2π/9 m/s²
θ = (2π/T) t
θ = (2π/60)(30)
θ = π rad
(b).
ω = 2π/T
ω = 2π/60
ω = π/30 rad/s
(c)
Lenard only has centripetal acceleration,
a = ω² r
a = (π/30)² (400/(2π))
a = 2π/9 m/s²