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a2k22
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Homework Statement
I need someone to walk me through this problem. I know its a bit lengthy, but my teacher hasn't explained how to do this, and I'm completely stumped.
A ball of mass 0.6 kg, initially at rest, is
kicked directly toward a fence from a point
20 m away, as shown below.
The velocity of the ball as it leaves the
kicker’s foot is 18 m/s at angle of 62 ◦ above
the horizontal. The top of the fence is 9 m
high. The kicker’s foot is in contact with the
ball for 0.06 s. The ball hits nothing while in
flight and air resistance is negligible.
The acceleration due to gravity is 9.8 m/s2.
Determine the time it takes for the ball to
reach the plane of the fence. Answer in units
of s.
Hint: Consider the diameter of the ball to be
negligible.
How far above the top of fence will the ball
pass? Answer in units of m.
What is the vertical component of the velocity
when the ball reaches the plane of the fence?
Answer in units of m/s.
Homework Equations
No clue...
The Attempt at a Solution
My teacher just randomly decided to give us this, even though we haven't learned it. And I'm not exaggerating, and therefore I'm completely lost.