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# Need help please with mechanics questions m1 watch

1. At time t = 0, two balls A and B are projected vertically upwards. The ball A is projected
vertically upwards with speed 2 m s–1 from a point 50 m above the horizontal ground.
The ball B is projected vertically upwards from the ground with speed 20 m s–1. At time
t = T seconds, the two balls are at the same vertical height, h metres, above the ground.
The balls are modelled as particles moving freely under gravity. Find
(a) the value of T,
(5)
(b) the value of h.
(2)
I understand you have to use the equation s=ut+1/2at^2 and then make the equations for both balls equal to eachothers to find t however i can't seem to do it correctly.

Why not try posting in a specific subject forum- you might have more luck there.

Here's a link to our subject forum which should help get you more responses.

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Updated: March 19, 2016
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