A ball is thrown upward with an initial velocity of 12.0m/s. Using 9.806 m/s2 as the acceleration of gravity, solve for the time when the ball reaches the highest point in its flight.
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- The tallest tree in a California national park is 112 m tall. Suppose that a ball is thrown downward from the top of that tree with a certain initial velocity. As the ball accelerates due to gravity (-9.81 m/s/s), it takes 3.856 s to hit the ground. With what initial velocity was the ball thrown toward the ground? (Hint: note the direction of the ball's drop when considering its displacement)An Osprey can fly horizontally (not diving) at a maximum speed of 70.0 km/hr. The bird takes off from rest at the edge of a cliff, heading east, and accelerates at a rate of 1.21 m/s2. The osprey can decelerate at higher rate of 2.43 m/s2. The Osprey can reach top speeds of about 84 mph. When doing so, it does not flap its wings. Rather, it relies on its gravitational force to accelerate it downwards. a. Assuming that it starts from rest, and assuming that drag forces are slim, how long will it take for the osprey to reach its top speed? b. How far does it travel during this time? c. Near the top speed, drag forces become important, and in fact the terminal velocity is determined by the drag force. Assuming that the osprey's body can be modeled as a cylinder, with its cross-sectional area equal to that of a circle with radius of 10 cm, what is the coefficient of drag C for a hawk?A hockey puck slides off the edge of a table with an initial velocity of 20.0 m/s. The height of the table above the ground is 2.0 m. What is the magnitude of the velocity of the puck just before it touches the ground?
- An rock is thrown straight up with an initial velocity of 18.5 m/s. What maximum height will the rock reach before starting to fall downward? (Take acceleration due to gravity as 9.80 m/s2.)A steel ball is dropped from a building’s roof and passes a window, taking 0.13 s to fall from the top to the bottom of the window, a distance of 1.20 m. It then falls to a sidewalk and bounces back past the window, moving from bottom to top in 0.13 s. Assume that the upward flight is an exact reverse of the fall. The time the ball spends below the bottom of the window is1.61 s. How tall is the building?A rock is thrown vertically upward with a speed of 13.0 m/sm/s from the roof of a building that is 70.0 mm above the ground. Assume free fall. What is the speed of the rock just before it strikes the ground? I will rate accordingly with multiple votes. Please do it correctly.
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