Question

A placekicker must kick a football from a point 36.0 m (about 40 yards) from the goal. Half the crowd hopes the ball will clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 24.0 m/s at an angle of 48.0° to the horizontal.

(a) By how much does the ball clear or fall short of clearing
the crossbar? (Enter a negative answer if it falls short.)

( )m

(b) Does the ball approach the crossbar while still rising or while
falling?

rising or falling ?

Answer #1

A placekicker must kick a football from a point 36.0 m
(about 40 yards) from the goal. Half the crowd hopes the
ball will clear the crossbar, which is 3.05 m high. When
kicked, the ball leaves the ground with a speed of 20.0 m/s
at an angle of 53.0° to the horizontal. (a) By how much
does the ball clear or fall short of clearing the crossbar?
(b) Does the ball approach the crossbar while still rising
or
while...

19. 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. By how much
does the ball clear or fall short of clearing the crossbar? The
acceleration of gravity is 9.8 m/s 2 . Answer in units of m....

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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