52. ao A ball is thrown straight upward. At 4.00 m above its launch point, the ball's speed is one-half its launch speed. What maximum height above its launch point does the ball attain?
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- Show solution. A ball is thrown straight upward. At 5.80 m above its launch point, the ball’s speed is one-half its launch speed. What maximum height above its launch point does the ball attain? a. 6.00m b. 12.31m c. 11.60m d. no answerA skier leaves the end of a horizontal ski jump at 22.0 m/s and falls through a vertical distance of 3.20 m before landing. Neglecting air resistance, (a) how long does it take the skier to reach the ground? (b) How far horizontally docs the skier travel in the air before landing? (Sec Section 3.4.)A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 10.0 m/s, and the distance from the limb to the level of the saddle is 3.00 m. (a) What must be the horizontal distance between the saddle and limb when the ranch hand makes his move? (b) For what time interval is he in the air?
- A daredevil is attempting to jump his motorcycle over a line of buses parked end to end by driving up a 32o ramp at a speed of 40.0 m/s . How many buses can he clear if the top of the takeoff ramp is at the same height as the bus tops and the buses are each 35.0 m long? ~ 10 ~ 7 ~ 4 ~ 125. A. How long does it take Viserion with his Queen Danaerys to take off if it needs toreach a speed on the ground of 350 km/h over a distance of 600m. (assume Viserionwith Queen Danaerys starts from rest)? B. What is the acceleration of Viserion with Queen Danaerys after 600m?A rock is thrown vertically upward with a speed of 14.0 m/sfrom the roof of a building that is 70.0 m above the ground. Assume free fall. 1) In how many seconds after being thrown does the rock strike the ground? Express your answer in seconds. 2) What is the speed of the rock just before it strikes the ground? Express your answer in meters per second.
- A girl is standing at the edge of a cliff 100. m above the ground. She reaches out over the edge of the cliff and throws a rock straight upward with a speed 8.00 m/s. a) How long does it take the rock to hit the ground? b) What is the speed of the rock the instant before it hits the ground?Two 47. identical pellet guns are fired simultaneously from the edge of a cliff. These guns impart an initial speed of 30.0 m/s to each pellet. Gun A is fired straight upward, with the pellet going up and then falling back down, eventually hitting the ground beneath the cliff. Gun B is fired straight downward. In the absence of air resistance, how long after pellet B hits the ground does pellet A hit the ground? 48. mmh An astronaut on a distant planet wants to determine its accel- eration due to gravity. The astronaut throws a rock straight up with a ve- locity of +15 m/s and measures a time of 20.0 s before the rock returns to his hand. What is the acceleration (magnitude and direction) due to gravity on this planet? I 52. A ball is thrown straight upward. At 4.00 m above its launch point, the ball's speed is one-half its launch speed. What maximum height above its launch point does the ball attain? 53. ssm From her bedroom window a girl drops a water-filled balloon to the ground,…A zombie is playing catch with his zombie friend's head. It throws up in the air with an inital velocity of 26.2 m/s. How long until the zombie head reaches the maximum height? how far?
- 1. A stone is thrown vertically downward at an initial speed of 14 m/s from a height of 65 m above the ground. A) How far does the ball travel in 2.0 s? B) What is its velocity of the just before it hits the ground? 2. Two balls are thrown vertically, both at the initial speed of 10.0m/s from a height of 60.0 m above the ground. Ball A is thrown upward, while ball B is projected downward. Which ball will hit the ground first?46. Go mmh A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 8.0 s. What is its initial velocity? Neglect air resistance.*62. CD A model rocket blasts off from the ground, rising straight up- ward with a constant acceleration that has a magnitude of 86.0 m/s² for 1.70 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) will the rocket reach?