Physicshard · Past Paper
A body is projected vertically upwards. If t1 and t2 are times at which it is at height h while ascending and descending respectively, then h is:
Ag*t1*t2 / 2
Bg(t1+t2) / 2
Csqrt(g*t1*t2)
D2g*t1*t2
✓ Correct Answer: A — g*t1*t2 / 2
Using the quadratic form of height equation, the product of roots t1*t2 = 2h/g, so h = 0.5*g*t1*t2.
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