Hello i have been able to do 7 out of 8 question on my linear motion questions, but this last question number 8, is proving difficult. I don't know whether the tutor has made a mistake (as the answers are typed at the bottom) so if you could be of help i would be very glad ty.(adsbygoogle = window.adsbygoogle || []).push({});

I am using s = u.t + 0.5.a.t^2

and v = U + a.t

but neither bring up the correct answers:

8. A pistol pellet is fired vertically upwards and lands back at its firing point

8 seconds later. Neglecting air resistance, and assuming the acceleration due to gravity is g = 9.81 m/s2 downwards ! find its maximum height and initial velocity.

[answers: 78.5 m , 39.2 m/s]

Ty every so much :-)

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# Find its maximum height and initial velocity

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