Science, asked by AFridiiiKhaaannn, 1 year ago

A ball is thrown up with a velocity of 30m/s.How much time will it take to reach the highest point ?

Answers

Answered by Anonymous

by taking the value of g...-10

v = u + at

0 = 30 +(-9.8)t

-30 = -10t

- 30/-10= t

3 = t

AFridiiiKhaaannn: no buddy answer showing here is t = 3sec but process isn't mention can you help me out buddy?

AFridiiiKhaaannn: thanks buddy

Anonymous: welcome...

Answered by abhi178

at highest point,
       velocity of body will be zero.
use formula,
      v = u + at
where, v is final velocity,u is initial velocity
and t is time taken by body and a is acceleration.
here, v = 0, u = 30m/s
     a = -10 m/s² [acceleration due to gravity ]

so, 0 = 30 + (-10)t
t = 30/10 = 3 sec

AFridiiiKhaaannn: yes I know but answer is showing 4.9N that's why I am stucked and confuse now

abhi178: yep i understand know

abhi178: because weight = mass * acceleration due to gravity

abhi178: here mass = 500gm = 0.5 kg

abhi178: acceleration due to gravity = 9.8m/s^2

AFridiiiKhaaannn: yes got it why 4.9 and not 4900 , because there is a decimal if we ignore 000 from 49000 we left with one decimal and we apply it to 49 and we get 4.9 N

abhi178: :)

AFridiiiKhaaannn: thanks for helping me out

AFridiiiKhaaannn: how did you become a moderator and how can I be become moderator , whats your way out to become?

AFridiiiKhaaannn: a body is allowed to fall from a height of 20m from the ground ,How much time will it take to reach the ground?

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