A player throws a ball with mass of 100 grams at an initial velocity vo = 25 m/s with an angle 8 = 60° from the horizontal at a height h₁ = 1.5 m. The ball hits the wall inclined a = 45° from the horizontal, at point B with a height h₂ = 2 m. After hitting the inclined wall, the ball rebounds horizontally to the left with a velocity v. Assume all surfaces are frictionless. Use angle of the velocity at point of impact B = 59.7°. 1. Given only the information disclosed so far and without using kinematic equations, which of the following methods is the most appropriate method to be used for solving the value of velocity of the ball just before impact with the inclined wall? 2. Which of the following best approximates the magnitude of the velocity of the ball at point B just before impact with the inclined wall? a. 24.8, b. 21.4, c.25.0, 12.5 3. When the ball hits the inclined wall, which of the following forces produces an impulse that is NOT negligible, given that the time interval At is very small? A. friction force bw ball and inclined wall b. weight of ball c. normal force bw ball and inclined wall d. all of the above 4. Which of the following best approximates the velocity of the ball at point B just after impact with the inclined wall, considering that the final velocity is purely horizontal? A. 12.50 m/s to the left b. 8.90 to the left c. 24.8 to the left d.33.9 to the left 5. Which of the following best approximates the value for the coefficient of restitution, considering that the final velocity is purely horizontal? A. 3.81, b. 0.731, c.1.0, d. 0.262
A player throws a ball with mass of 100 grams at an initial velocity vo = 25 m/s with an angle 8 = 60° from the horizontal at a height h₁ = 1.5 m. The ball hits the wall inclined a = 45° from the horizontal, at point B with a height h₂ = 2 m. After hitting the inclined wall, the ball rebounds horizontally to the left with a velocity v. Assume all surfaces are frictionless. Use angle of the velocity at point of impact B = 59.7°. 1. Given only the information disclosed so far and without using kinematic equations, which of the following methods is the most appropriate method to be used for solving the value of velocity of the ball just before impact with the inclined wall? 2. Which of the following best approximates the magnitude of the velocity of the ball at point B just before impact with the inclined wall? a. 24.8, b. 21.4, c.25.0, 12.5 3. When the ball hits the inclined wall, which of the following forces produces an impulse that is NOT negligible, given that the time interval At is very small? A. friction force bw ball and inclined wall b. weight of ball c. normal force bw ball and inclined wall d. all of the above 4. Which of the following best approximates the velocity of the ball at point B just after impact with the inclined wall, considering that the final velocity is purely horizontal? A. 12.50 m/s to the left b. 8.90 to the left c. 24.8 to the left d.33.9 to the left 5. Which of the following best approximates the value for the coefficient of restitution, considering that the final velocity is purely horizontal? A. 3.81, b. 0.731, c.1.0, d. 0.262
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Transcribed Image Text:A player throws a ball with mass of 100 grams at an initial velocity vo = 25 m/s with an angle 8 = 60° from the
horizontal at a height h₁ = 1.5 m. The ball hits the wall inclined a = 45° from the horizontal, at point B with a height
h₂ = 2 m. After hitting the inclined wall, the ball rebounds horizontally to the left with a velocity v. Assume all
surfaces are frictionless. Use angle of the velocity at point of impact 3 = 59.7°.
h₂
h₂
1. Given only the information disclosed so far and without using kinematic equations, which
of the following methods is the most appropriate method to be used for solving the value of
velocity of the ball just before impact with the inclined wall?
2. Which of the following best approximates the magnitude of the velocity of the ball at point
B just before impact with the inclined wall? a. 24.8, b. 21.4, c.25.0, 12.5
3. When the ball hits the inclined wall, which of the following forces produces an impulse that is
NOT negligible, given that the time interval At is very small? A. friction force bw ball and
inclined wall b. weight of ball c. normal force bw ball and inclined wall d. all of the above
4. Which of the following best approximates the velocity of the ball at point B just after impact
with the inclined wall, considering that the final velocity is purely horizontal? A. 12.50 m/s to
the left b. 8.90 to the left c. 24.8 to the left d.33.9 to the left
5. Which of the following best approximates the value for the coefficient of restitution,
considering that the final velocity is purely horizontal? A. 3.81, b. 0.731, c. 1.0, d. 0.262
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