Question

A ball is droped from a height of 100m then another ball us thrown vertically upwards with a speed of 50m/s after what time do they cross each other

Answer 1

Hey user,

100- h) = 0 – ½ gt2 g be negative be cause or h = 100 – ½ gt2 …. (1) its direction be downward

 

 For B –

 h = 50t – ½ gt2 …… (2) 1/2

 From 1 and 2

 

 

 

 or 100 = 50t

 

 or t= 2 sec

Hope thishelps and pls mark it as brainliest!