Ah go on, here’s one more
Clearly whoever wrote this question wanted the student to use a=-ω²x, and convert f into ω, but look at the numbers closely… what is the length of that pendulum? It’s less than 1cm. How can a pendulum less than 1cm long be displaced from equilibrium by 20cm? Oh dear.
I think I need to make a new blog category for physics mistakes!
Reminder: Weekly Live Tuition Sessions!
SUNDAY 11th January
GCSE Physics 9:30am – 10:20am Infrared radiation A-Level Physics 10:30am – 11:20am Measurement of specific charge GCSE Astronomy 11:30am – 12:20pm Exploring the moon If you wish to enrol on the tuition sessions and haven’t yet, then click enrol below
Physics with Keith 