Question

Problem analysis(equation of motion)
A ball is thrown vertically upward with initial velocity of 30 ms^-1. Find
a)time taken to reach the highest point
b)distance travel

Answer 1

@Abhisar

Answer 2

ok, let's see. At the highest point ball will have a zero velocity i.e V=0. U is given 30 m/s\(^2\)

Answer 3

use the first formula V=U-at and find the time taken, take a=-g since motion is in opp direction of g

Answer 4

It shld be v=u+at rite

Answer 5

oh yes,

Answer 6

3s

Answer 7

but after taking a=-g it will become v=u-gt

Answer 8

If you assume Positive gravity then you also must assume negative velocity because of the rotation of the axis.

Answer 9

That's correct @eric_d , now use the second equation to find the distance.