Question

A stone is projected vertically up from the ground with velocity 40 m/s

Answer 1

Answer:

yup!

the stone's velocity is 40m/s vertically upward and then it will be under gravity and fall down

Answer 2

Answer:

Explanation:

Your question seems incomplete.

I think the complete question is:

Ques : A stone is projected vertically up from the ground with a velocity 40 m/s . The interval of time between the two instants at which the stone is at height of 60 m above the ground is (g=10m/s²)

Solution:

Time of ascent is equal to initial velocity divided by gravity that is 9.8m/s or 10m/s on earth

time of ascent=u/g

40/10

4sec

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