Question

15. An object thrown upwards reaches the highest point
in 5.0 s. Find the velocity with which it was thrown.
16. A stone thrown upwards attains a maximum height
of 19.6 m. Find the velocity with which it was
thrown.
17. A body is thrown upwards with a velocity of
20 m/s. How much time will it take to return to its
original position?
18. A ball is dropped from a height 2.50 m above the
floor. (a) Find the speed v with which it reaches the
floor. (b) The ball now rebounds. The speed of the
ball is decreased to 3v /4 due to this collision. How
high will the ball rise?
19. A stone is dropped from a cliff at 2:30:30 p.m. (hour:
minute:second). Another stone is dropped from the
same point at 2:30:31 p.m. Find the separation
between the stones at (a) 2:30:31 p.m., (b) 2:30:35
p.m.
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Answer 1

Answer:

please try to ask one question at a time