Year 12s: what will be the first way you research your future options? >>

M1 question

A particle P is projected vertically upwards from a point X. 5 seconds later P is moving downwards with speed 10ms^-1. Find the speed of projection of P.

I got 59ms^-1 but the answers say 39ms^-1

Posted from TSR Mobile

Reply 1

Extricated

Check your signs are correct. Haven't done the q but must be a sign error somewhere e.g did you use a as 9.8 or -9.8 , are you using upwards as positive etc

Reply 2

Pilot96

Original post by Extricated

Check your signs are correct. Haven't done the q but must be a sign error somewhere e.g did you use a as 9.8 or -9.8 , are you using upwards as positive etc