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1. A projectile is launched at an angle of 300 above the horizontal. Neglecting air resistance, what are the projectile's horizontal and vertical accelerations when it reaches its maximum height? [a] Both the horizontal and vertical accelerations are zero. [b] The horizontal acceleration is zero and the vertical acceleration is 9.81 m/s2. [cl The horizontal acceleration is 9.81 m/s2 and the vertical acceleration is zero. [d] Both the horizontal and vertical accelerations are 9.81 m/s2.

1. A projectile is launched at an angle of 300 above the horizontal. Neglecting air resistance, what are the projectile's horizontal and vertical accelerations when it reaches its maximum height? [a] Both the horizontal and vertical accelerations are zero. [b] The horizontal acceleration is zero and the vertical acceleration is 9.81 m/s2. [cl The horizontal acceleration is 9.81 m/s2 and the vertical acceleration is zero. [d] Both the horizontal and vertical accelerations are 9.81 m/s2.

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1. A projectile is launched at an angle of 300 above the horizontal. Neglecting air resistance, what are the projectile's horizontal and vertical accelerations when it reaches its maximum height? [a] Both the horizontal and vertical accelerations are zero. [b] The horizontal acceleration is zero and the vertical acceleration is 9.81 m/s2. [c] The horizontal acceleration is 9.81 m/s2 and the vertical acceleration is zero. [d] Both the horizontal and vertical accelerations are 9.81 m/s2. 2. A football player kicks a ball with an initial velocity of 25 m/s at an angle of 530 above the horizontal. The vertical component of the initial velocity of the ball [a] 25 m/s [b] 20. m/s [c] 15 m/s [d] 10. m/s 3. Which of the following could not be the resultant displacement of a 20 meter vector and 30 meter vector? (1) 0 m (2) 10 m (3)15 m (4) 50 m 4. A football is kicked at an angle of 25 degrees and travels 50 yards. If the football is kicked at the same speed, what other angle will allow the football to travel 50 yards? (1) 900 (2) 450 (3) 550 (4) 650 5. A red ball and a green ball are simultaneously thrown horizontally from the same height. The red ball has an initial speed of 40. meters per second and the green ball has an initial speed of 20. meters per second. Compared to the time it takes the red ball to reach the ground, the time it takes the green ball to reach the ground will be [a] the same [b] twice as much [c] half as much [d] four times as much 6. A student walks 1.0 kilometer due east and 3.0 kilometer due south. Then she runs 5.0 kilometers due west. The magnitude of the student's resultant displacement is
Transcribed Image Text:1. A projectile is launched at an angle of 300 above the horizontal. Neglecting air resistance, what are the projectile's horizontal and vertical accelerations when it reaches its maximum height? [a] Both the horizontal and vertical accelerations are zero. [b] The horizontal acceleration is zero and the vertical acceleration is 9.81 m/s2. [c] The horizontal acceleration is 9.81 m/s2 and the vertical acceleration is zero. [d] Both the horizontal and vertical accelerations are 9.81 m/s2. 2. A football player kicks a ball with an initial velocity of 25 m/s at an angle of 530 above the horizontal. The vertical component of the initial velocity of the ball [a] 25 m/s [b] 20. m/s [c] 15 m/s [d] 10. m/s 3. Which of the following could not be the resultant displacement of a 20 meter vector and 30 meter vector? (1) 0 m (2) 10 m (3)15 m (4) 50 m 4. A football is kicked at an angle of 25 degrees and travels 50 yards. If the football is kicked at the same speed, what other angle will allow the football to travel 50 yards? (1) 900 (2) 450 (3) 550 (4) 650 5. A red ball and a green ball are simultaneously thrown horizontally from the same height. The red ball has an initial speed of 40. meters per second and the green ball has an initial speed of 20. meters per second. Compared to the time it takes the red ball to reach the ground, the time it takes the green ball to reach the ground will be [a] the same [b] twice as much [c] half as much [d] four times as much 6. A student walks 1.0 kilometer due east and 3.0 kilometer due south. Then she runs 5.0 kilometers due west. The magnitude of the student's resultant displacement is
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