Please assist in (ii). My answer is pi/3 + 2sqrt3. But answer is pi/3 + 2sqrt3 -

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secondary 4 A Maths

Please assist in (ii). My answer is pi/3 + 2sqrt3. But answer is pi/3 + 2sqrt3 -4. Why need to -4? Thanks!

Date Posted: 6 years ago

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Date Posted: 6 years ago

Jiayang

6 years ago

Won't go wrong if you just integrate. The 4 is because at t=0 the particle is already 4m away from O

Madeline

6 years ago

Thank you so much. So can I say that to find distance always need to do definite integral?

Jiayang

6 years ago

Yeap. Just be careful about the turning point(s) and signs

Madeline

6 years ago

Ok thanks so much