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Hi I am a grade 12 student in Physics 12 in BC, and I was wondering for projectiles, what equations you use, and what variables you use to solve. For example, in our notes our teacher gave us and example and completed it for us, but I don’t get why he used the equations he did. I do know that you use kinematics equations, and you have to change the initial velocity of the object into its 2 components Vy and Vx using component method, but other than that I don’t get why you use an equation and not another one.
Here is the problem, and any help at all would be appreciated.
A golf ball is hit diagonally (37o) off the top of a 15m cliff at 40m/s.
Find:
a) Time to max height
b) Max height achieved
c) Entire time in air
d) Range
e) Velocity at 1.0 seconds
f) Velocity at impact
Here is the picture that I drew to start.
http://img23.imageshack.us/img23/556/physicsquestion.th.png
Then I found the Vx and the Vy.
http://img3.imageshack.us/img3/1953/physicsquestion1.th.png
Now I'm stuck to find the first thing...because I don't know how to get it.
Help please?
The answers to the question are:
a) 2.46 sec
b) 44.6 m
c) 5.47 sec
d) 175 m
e) 35.0 m/s @ 24.1o above horizontal
f) (do not have b/c notes are incomplete)
Here is the problem, and any help at all would be appreciated.
A golf ball is hit diagonally (37o) off the top of a 15m cliff at 40m/s.
Find:
a) Time to max height
b) Max height achieved
c) Entire time in air
d) Range
e) Velocity at 1.0 seconds
f) Velocity at impact
Here is the picture that I drew to start.
http://img23.imageshack.us/img23/556/physicsquestion.th.png
Then I found the Vx and the Vy.
http://img3.imageshack.us/img3/1953/physicsquestion1.th.png
Now I'm stuck to find the first thing...because I don't know how to get it.
Help please?
The answers to the question are:
a) 2.46 sec
b) 44.6 m
c) 5.47 sec
d) 175 m
e) 35.0 m/s @ 24.1o above horizontal
f) (do not have b/c notes are incomplete)
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