26. A projectile is launched from the top of a building with an initial velocity of 30 m/s at an angle of 60° above the horizontal. The magnitude of its velocity at t = 5 s after the launch is (show solution)
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- A father demonstrates projectile motion to his children by placing a pea on his fork's handle and rapidly depressing the curved tines, launching the pea to heights above the dining room table. Suppose the pea is launched at 7.67 m/s at an angle of 81.0°above the table. With what speed (in m/s) does the pea strike the ceiling 1.90 m above the table?A projectile is fired horizontally - think about what this means about the initial y-velocity (viy) - at a velocity of 5.61 m/s. It is fired from a height of 1.04 meters. How far horizontally does the projectile go before it hits the ground?A person throws a ball horizontally from the top of a building that is 20.0 m above the ground level. The ball lands 100 m from the base of the building. What was the initial velocity of the ball? Neglect air resistance.
- A father demonstrates projectile motion to his children by placing a pea on his fork's handle and rapidly depressing the curved tines, launching the pea to heights above the dining room table. Suppose the pea is launched at 7.39 m/s at an angle of 85.0° above the table. With what speed (in m/s) does the pea strike the ceiling 1.90 mabove the table?At a top of a building, a projectile is launched with an initial velocity of 25.0m/s at an angle of 30° above the horizontal. It takes the projectile t = 3.96s from launch to hit the ground, a. What is the height of the building?Problem 36. A ball is kicked towards a wall (on earth) that is a horizontal distance of 30 m from the ball. The wall is 4 m high. The ball is launched with an initial speed of 40 m/s. (Neglect air resistance and assume that the process takes place on earth.) A) What must be the launch angle of the ball if the ball is to barely reach the bottom of the wall? B) What must be the launch angle of the ball if the ball is to barely clear the top of the wall?
- A baseball player, Joey, hits a baseball from 1.00 meter off the ground giving it an initial velocity of 64 m/s at 17° above the horizontal. The outfielders on the other team have a 100% accuracy rate, so a home run can only be achieved if Joey hits the ball over a 2.50 m tall fence that is 80.0 m away from where he hit the ball. Once the ball leaves the bat, it is only under the influence of gravity and air resistance can be ignored. Find the following: a.) What is the maximum height the ball reaches? b.) Does Joey hit a home run? Answer yes or no and explain your answer.A soccer goal is 2.44 m high. A player kicks the ball at a distance 23 m from the goal at an angle of 26°, and the ball just hits the top of the goal. What is the initial speed of the soccer ball (in m/s)?At a top of a building, a projectile is launched with an initial velocity of 25.0m/s at an angle of 30° above the horizontal. It takes the projectile t = 3.96s from launch to hit the ground, B. What is the velocity of the projectile as it hits the ground? (Magnitude + direction)
- A projectile is thrown from the top of a cliff with an initial speed of 25 m/s at an angle of 600 up from the horizontal. If the projectile lands 100 m from the base of the cliff how tall is the cliff?A father demonstrates projectile motion to his children byplacing a pea on his fork’s handle and rapidly depressing thecurved tines, launching the pea to heights above the diningroom table. Suppose the pea is launched at 8.25 m/s at anangle of 75.0° above the table. With what speed does the peastrike the ceiling 2.00 m above the table?Eddie is a football player; he kicks a ball with an initial velocity of 50m/s at an angle of 30deg with the horizontal. Nestor who is a friend of Eddie is 100m away and walking on the direction of the balI. If Eddie is going to hit Nestor with the ball. How fast must Nestor walks?