An object thrown upwards reaches the highest point in 5s . Find the velocity with which it ws thrown . Also find the displacement ... Pls ans .... 2mrw is ma exam ......
Given, u = ?
v = 0 (as the object comes to rest)
a = (-10m/s^2) ( acceleration due to Earth's gravity )
t = 5 sec
So, use the first equation of motion
v = u + at
0 = u + (-10)*5
0 = u -50
50 = u
u = 50 m/s
Thus, the initial velocity is 50 m/s
So, use the second equation of motion
s = ut + 1/2 at^2
s = 50*5 + 1/2 * (-10)*5*5
s = 250 - 125
s = 125 m
Thus, the displacement is 125 m.
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