A stone thrown from the top of a building is given an initial velocity of 20m/s straight upward. The building is 50m high, determine: a) the time at which the stone reaches its maximum height, b) the maximum height, c) the time at which the stone returns to the height from which it was thrown,
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- A tennis ball thrown from the top of a building is given an initial velocity of 20 m/s straightupward. The building is 50 m high, and the ball just misses the edge of the roof on its waydown. Using t = 0 as the time the ball leaves the thrower’s hand, determinea. the time at which the ball reaches its maximum height b. the maximum height c. the time at which the ball returns to the height from which it was thrown d. the velocity of the ball at this instant e. the velocity and position of the ball at t = 5 sA mountain climber stands at the top of a 20.0 m cliff that overhangs a calm pool of water. She throws two stones vertically downward 1.00 s apart and observes that they cause a single splash. The first stone had an initial velocity of -2.80 m/s. (a) How long after the release of the first stone did the two stones hit the water? (Round your answer to at least two decimal places.) (s)(b) What initial velocity must the second stone have had, given that they hit the water simultaneously? (m/s)(c) What was the velocity of each stone at the instant it hit the water? first stone m/s second stone m/sA stone is thrown from the top of a building with a velocity of 20 m/s straight upward. The building is 50 m high, and the stone just misses the edge of the roof on its way down. Determine (a) the time needed for the stone to reach its maximum height, (b) the maximum height, (c) the time needed for the stone to return to the level of the thrower, and (d) the velocity of the stone at this instant.
- A ball is thrown from the top of a building with an initial velocity of 20.0 m/s straight upward, at an initial height of 50.0 m above the ground. The ball just misses the edge of the roof on its way down. Determine (a) the time neededfor the ball to reach its maximum height (b) the maximum height, (c) the time needed for the ball to return to the height from which it was thrown and the velocity of the ball at that instant.A mountain climber stands at the top of a 35.0 m cliff that overhangs a calm pool of water. She throws two stones vertically downward 1.00 s apart and observes that they cause a single splash. The first stone had an initial velocity of -1.20 m/s. (a) How long after release of the first stone did the two stones hit the water? (Round your answer to at least two decimal places.) (b) What initial velocity must the second stone have had, given that they hit the water simultaneously? (c) What was the velocity of each stone at the instant it hit the water?A ball is thrown directly downward with an initial speed of 8.70 m/s, from a height of 30.1 m. After what time interval does it strike the ground?
- At the same moment from the top of a building 3.0 × 10^2 m tall, one rock is droppedand one is thrown downward with an initial velocity of 10 m/s. Both of them experience negligible air resistance. How much EARLIER does the thrown rock strike the ground?Comparing velocities Two stones are thrown vertically upward,each with an initial velocity of 48 ft/s at time t = 0. One stone isthrown from the edge of a bridge that is 32 feet above the ground,and the other stone is thrown from ground level. The height abovethe ground of the stone thrown from the bridge after t seconds isƒ(t) = -16t2 + 48t + 32, and the height of the stone thrownfrom the ground after t seconds is g(t) = -16t2 + 48t.a. Show that the stones reach their high points at the same time.b. How much higher does the stone thrown from the bridge gothan the stone thrown from the ground?c. When do the stones strike the ground and with what velocities?A jetliner travelling northward is landing with a speed of 69m/s . Once the jet touches down it has 750 m of runway in which to reduce its speed to 6.1m/s. Calculate the average acceleration of the plane during the landing . And IF identical pellet guns are fired simultaneously from the edge of a cliff. These guns impart an initial speed of 30.0m/s to each pellet. Gun A is fired straight upwards, with the pellet going up and the n falling back down, eventually hitting the ground beneath the cliff. Gun B is fired straight downwards. In the absence of air resistance, Calculate how long after pellet B hits the ground does pellet A hit the ground?
- An inquisitive physics student and mountain climber climbs a 51.0-m-high cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of 2.06 m/s. (b) What initial velocity must the second stone have if the two stones are to hit the water simultaneously?A particle travels along a straight line such that in 4s it moves from an initial position SA = +1.00 m to a position SB = - 4.50 m. Then in another 7s it moves from SB to SC = +1.75 m. Determine the particle's average velocity during the time interval.An athlete sprints in a straight line for 50.0 m in 8.00 s, and then walks slowly back to the starting line in 40.0 s. If the“sprint direction” is taken to be positive, what are (a) the average sprint velocity, (b) the average walking velocity, and(c) the average velocity for the complete round trip?