1. On level ground a shell is fired with an initial velocity of 23.0 m/s at 72.5° above the horizontal and feels no appreciable air resistance. (a) Find the horizontal and vertical components of the shell's initial velocity. (b) How long does it take the shell to reach the ground? (c) How far from its firing point does the shell land?

Physics for Scientists and Engineers
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Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter4: Motion In Two Dimensions
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Problem 16P: A projectile is fired from the top of a cliff of height h above the ocean below. The projectile is...
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1. On level ground a shell is fired with an initial velocity of 23.0 m/s at 72.5° above the horizontal and feels no
appreciable air resistance. (a) Find the horizontal and vertical components of the shell's initial velocity. (b) How
long does it take the shell to reach the ground? (c) How far from its firing point does the shell land?
2. A rookie quarterback throws a football with an initial upward velocity component of 12.0 m/s and a horizontal
velocity component of 39.0 m/s. Ignore air resistance. (a) What is the magnitude and the direction of the initial
velocity of the football (b) How high is this maximum height? (c) How far has the football traveled horizontally
during this time?
3. After getting into a quarrel, a kid throws a bully's slippers with a speed of 11 m/s at an angle 47.0° above the
horizontal. (a) What is the time of flight of the slippers? (b) How far away is the slipper from where it was
thrown (c) What is the final velocity of the slipper before it reaches the ground?
4. A pool ball leaves a 0.29-meter-high table with an initial velocity of 3.6 m/s. (a) What is the time required for the
pool ball to fall to the ground? (b) What is horizontal distance between the table's edge and the ball's landing
location? (c) What is the final velocity of the pool ball before reaching the ground?
5. A marble rolls off a tabletop 5.0 m high and hits the floor at a point 10.0 m away from the table's edge in the
horizontal direction. (a) How long is the marble in the air? (b) What is the speed of the marble at 0.5 seconds?
(c) What is its speed when it hits the floor?
6. Cardo shot a bullet from shoulder height (1.6 m). The initial speed of the bullet 196 m/s. (a) How much time
elapses before the bullet hits the ground? (b) How far does the bullet travel horizontally? (c) What is the bullet's
velocity at 0.25 seconds?
Transcribed Image Text:1. On level ground a shell is fired with an initial velocity of 23.0 m/s at 72.5° above the horizontal and feels no appreciable air resistance. (a) Find the horizontal and vertical components of the shell's initial velocity. (b) How long does it take the shell to reach the ground? (c) How far from its firing point does the shell land? 2. A rookie quarterback throws a football with an initial upward velocity component of 12.0 m/s and a horizontal velocity component of 39.0 m/s. Ignore air resistance. (a) What is the magnitude and the direction of the initial velocity of the football (b) How high is this maximum height? (c) How far has the football traveled horizontally during this time? 3. After getting into a quarrel, a kid throws a bully's slippers with a speed of 11 m/s at an angle 47.0° above the horizontal. (a) What is the time of flight of the slippers? (b) How far away is the slipper from where it was thrown (c) What is the final velocity of the slipper before it reaches the ground? 4. A pool ball leaves a 0.29-meter-high table with an initial velocity of 3.6 m/s. (a) What is the time required for the pool ball to fall to the ground? (b) What is horizontal distance between the table's edge and the ball's landing location? (c) What is the final velocity of the pool ball before reaching the ground? 5. A marble rolls off a tabletop 5.0 m high and hits the floor at a point 10.0 m away from the table's edge in the horizontal direction. (a) How long is the marble in the air? (b) What is the speed of the marble at 0.5 seconds? (c) What is its speed when it hits the floor? 6. Cardo shot a bullet from shoulder height (1.6 m). The initial speed of the bullet 196 m/s. (a) How much time elapses before the bullet hits the ground? (b) How far does the bullet travel horizontally? (c) What is the bullet's velocity at 0.25 seconds?
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