Question

A football kicker is practicing a field goal ick. THe football (on the ground before it starts) has a initial velocity of 24 m/s at an angle of 40 degrees above the horizontal. The ball flies between two goal posts and hits the right cross bar. The cross bar is 10 ft above the ground. Ignore air resistance.

a) What are the x and y components of the intial velocity b) What is the total flight time of the football c) What is the horizontal distance between the kicker and the crossbar

d) Find the magnitude and direction ( angle relative to a postive x) of the velocity of the football just before it hits the crossbar

Answer #1

(a)

(b)

(c)

(d)

A football is kicked from ground level with an initial velocity
of 24.2 m/s at angle of 51.0° above the horizontal. How long, in
seconds, is the football in the air before it hits the ground?
Ignore air resistance.

20. A place kicker must kick a football from a point 35 m (about
38 yd) from the goal, and the ball must clear the crossbar, which
is 3.05 m high. When kicked, the ball leaves the ground with a
speed of 23 m/s at an angle of 51◦ to the horizontal. To determine
if the ball approaches the crossbar while still rising or while
falling, what is its vertical velocity at the crossbar? Answer in
units of m/s.

To win the game, a place kicker must kick a football from a
point 45 m (49.212 yd) from the goal, and the ball must clear the
crossbar, which is 3.05 m high. When kicked, the ball leaves the
ground with a speed of 24 m/s at an angle of 32.6 ◦ from the
horizontal. The acceleration of gravity is 9.8 m/s 2 . By how much
vertical distance does the ball clear the crossbar? Answer in units
of m.

To win the game, a place kicker must kick a football from a
point 45 m (49.212 yd) from the goal, and the ball must clear the
crossbar, which is 3.05 m high. When kicked, the ball leaves the
ground with a speed of 24 m/s at an angle of 32.6 ◦ from the
horizontal. The acceleration of gravity is 9.8 m/s 2 . By how much
vertical distance does the ball clear the crossbar? Answer in units
of m.

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38 yd) from the goal, and the ball must clear the crossbar, which
is 3.05 m high. When kicked, the ball leaves the ground with a
speed of 23 m/s at an angle of 51◦ to the horizontal. By how much
does the ball clear or fall short of clearing the crossbar? The
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