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an object, P is thrown vertically up and after 3s later another object ,Q is thrown up with the same initial speed of 20m/s and at the same position. find:

a) the time, answer: [T][/P]= 3.54s, [T][/Q]= 0.54s

a) the time, answer: [T][/P]= 3.54s, [T][/Q]= 0.54s

**2. i use this formula v=u + at**

v=0 , u=20m/s a=9.8 ,t=?

but my answer is 2.04s

anyone helps me~thank you

v=0 , u=20m/s a=9.8 ,t=?

but my answer is 2.04s

anyone helps me~thank you

## The Attempt at a Solution

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