61 842
Assignments Done
Successfully Done
In May 2018

Answer to Question #29258 in Mechanics | Relativity for slvi

Question #29258
a ball is projected upwards from the top of a tower with a velocity of 50m/s making an angle of 30 degree with the horizontal. the hieght of the tower is 70m. after how many seconds from the instant of throwing will the ball reach the ground?
Expert's answer

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


Assignment Expert
02.05.13, 18:35

This is the formula expressing the distance in case of accelerated motion.
In most general form it looks like this s=s0+vt+at^2/2
In our case we assume that h is the height of the ball and h=0 on the ground. So h increases in vertical direction. Also we have acceleration due to gravity, which acts downwards, that's why we take a=-g
We take the term vt with "+" sign because a ball is projected upwards due to the statement.
We have h0 in the formula, because initial position of the ball due to vertical axis is not zero: a ball is projected upwards from the top of a tower, the hieght of the tower is
Hopefully, now it's clear.

02.05.13, 17:33

from where did we get h=h0+vt-gt^2/2 ?

Leave a comment

Ask Your question

Privacy policy Terms and Conditions