SOLUTION: Its the kinematic section in the mechanics book. I dont understand how to do question 1a, i can do 1b :D It is. A ball is thrown vertically upwards with a speed of 10ms-1 fr

Question 107895This question is from textbook Mechanics I
: Its the kinematic section in the mechanics book. I dont understand how to do question 1a, i can do 1b :D
It is.
A ball is thrown vertically upwards with a speed of 10ms-1 from a point 2m above the ground. (a) Calculate the length of time for which the ball is 3m or more above the ground.
I have no idea how to deal with this type of question where it starts above the ground, and we have to find how long it is above a certain point, if some one could help it would be greatly appreicated! Thanks! :D This question is from textbook Mechanics I

Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
the general equation is h(t)=-.5gt^2+Vot+Ho
... where h(t) is the height at time t, g is gravitational acceleration, Vo is initial velocity, and Ho is initial height

plug in the values and solve for t when h(t)=3 ... you will get two answers ... you want their difference
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