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 V

Here is the problem, and any help at all would be appreciated.

A golf ball is hit diagonally (37

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 [Broken]

Then I found the V

http://img3.imageshack.us/img3/1953/physicsquestion1.th.png [Broken]

Now i'm stuck to find the first thing...because I dont 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 @ 24.1

f) (do not have b/c notes are incomplete)

_{y}and V_{x}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 (37

^{o}) 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 [Broken]

Then I found the V

_{x}and the V_{y}.http://img3.imageshack.us/img3/1953/physicsquestion1.th.png [Broken]

Now i'm stuck to find the first thing...because I dont 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 @ 24.1

^{o}above horizontalf) (do not have b/c notes are incomplete)

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