FREE FALL4. If a pebble in an example problem is initially thrown downwards at 5m/s, how much time will it take to reach the ground? At what velocity will it hit the ground? At what time will it reach a velocity of 15m/s? Where is the pebble at v=7m/s.5. Resolve the above problem if the pebble was thrown upwards instead. Use the same given values. How high will the pebble reach?

FREE FALL4. If a pebble in an example problem is initially thrown downwards at 5m/s, how much time will it take to reach the ground? At what velocity will it hit the ground? At what time will it reach a velocity of 15m/s? Where is the pebble at v=7m/s.5. Resolve the above problem if the pebble was thrown upwards instead. Use the same given values. How high will the pebble reach?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter4: Motion In Two And Three Dimensions

Section: Chapter Questions

Problem 99CP: World’s Longest Par 3. The tee of the world’s longest par 3 sits atop South Africa’s Hanglip...

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World’s Longest Par 3. The tee of the world’s longest par 3 sits atop South Africa’s Hanglip Mountain at 400.0 m above the green and can only be reached by helicopter. The horizontal distance to the green is 359.0 in. Neglect air resistance and answer the following questions. (a) If a golfer launches a shot that is 40 with respect to the horizontal, what initial velocity must she give the ball? (b) What is the time to reach the green?
(a) Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.00 m/s. (b) How long would it take to reach the ground if it is thrown straight down with the same speed?
Amodel rocket is fired vertically upward with an initial velocity of 42 m/s from a tower 165 m high. a. How long will it take for the rocket to reach its maximum height? b. What is the maximum height? c. How long will it take for the rocket to pass its starting point on the way down? d. What is the velocity when it passes the starting point on the way down? e. How long will it take for the rocket to hit the ground? f. What will be its speed at impact?
Two people stand across from one another at the top edges of identical buildings, 50 meters above the ground. One person throws a rock straight upwards with an initial speed of 15 m/s, while the other person throws their rock straight downwards with an initial speed of 15 m/s. If both of the rocks miss the building and continue down to the street, a. How long will it take for the rock thrown upwards to reach the ground? b. How long will it take for the rock thrown downwards to reach the ground? c. How fast will the upward thrown rock be travelling just before it hits the ground? The downward thrown rock?
A ball is thrown down with an initial speed of 4.0 m/s from a height of 12 m above the ground. Match the anwers with questions. Use g = 10 m/s2. v the ball's initial velocity I. -10 m/s v the ball's final velocity right before it hits the ground II. 4.0 m/s v the ball's displacement III. 16 m/s v the ball's acceleration IV. 10 m/s2 V. -4.0 m/s VI. 10 m/s VII. -16 m/s VIII. -12 m IX. 10 m/s2 X. 12 m
Vix = a. What are the (x,y) components of the initial velocity? m/s m Xf= ymax Xf b. What is Ay, the height above the end of the ramp? What is ymax? Ay=- Seconds Vfx = Viy m Ymax F c. Use the quadratic formula to determine how much time the skier is in the air? 2. A skier travels down a slope, which turns up at the bottom, launching the skier at an angle = 53°above the horizontal. The skier leaves the end of the ramp with an initial speed of 35 m/s. The end of the ski ramp is y₁ = 10 m above the ground. d. How far from the end of the ramp, horizontally, does the skier hit the ground? e. What are the (x,y) components of the skier's final velocity? m/s m/s. Vfy = f. What is the magnitude and direction of ve? magnitude of ve m/s m m/s
A ball is thrown upward with an initial velocity of vo=47ft/s. Ignore wind resistance and horizontal motion. a. What is the maximum height the ball reaches in ft? b.If the ball lands on a platform that is d===5ft higher than it was thrown from. How long (in seconds) is the ball in the air? c.What is the minimum required initial velocity (in ft/s ) for the ball to reach the height of the platform?
An aircraft with a landing velocity of 79m/s is to touchdown at the start of a 2300m useable runway. If the aircraft plans to decelerate at a rate of 1.2m/s^2, is the runway enough to bring the aircraft to a full stop? If not, what does the landing aircraft need to adjust? A. Yes, the runway is enough B. No, the runway is not enough. Increase landing velocity C. No, the runway is not enough. Increase the rate of deceleration. D. No, the runway is not enough. Land anyway.
Evaluation: A. Explain free falling body B. Solve the following problems neatly: 1. A stone is thrown vertically upward from the ground with a velocity of 15 m/sec. One second later, another stone is thrown vertically upward with a velocity of 30 m/sec. a. When will the stones be at the same level? Ans. t = 1.4 sec b. How far above the ground will the stones be at the same level? Ans S =11.4 m c. Determine the time the second stone travelled until the stones are at the same level? Ans. t2 = 0.4 sec 2. A stone is dropped from a balloon at an elevation of 300 m. Two seconds later, another stone is projected vertically upward from the ground with a velocity of 75 m/sec. a. When will the stones pass each other? Ans. t = 4.963 sec b. Where will the stones pass each other from the ground? Ans. S = 179.2 m c. Compute the time travelled by the stone from the ground until they pass each other. Ans. t2 = 2.96 sec 3. A stone is thrown vertically into the air at a velocity of 60 m/sec. After 4…
9.8 ms2 and A stone is thrown vertically upwards with a speed of 24.0 ms'. Using g = ignoring air resistance: C. i. How much time is required to reach this height? ii. Why are there two answers to (ii.)? Sketch the velocity-time graph for the stone, from it is released until it returns to the thrower. iii.
1. A stone is thrown vertically upward from the ground with a velocity of 15 m/sec. One second later, another stone is thrown vertically upward with a velocity of 30 m/sec. a. When will the stones be at the same level? Ans. t = 1.4 sec b. How far above the ground will the stones be at the same level? Ans S =11.4 m c. Determine the time the second stone travelled until the stones are at the same level? Ans. t2 = 0.4 sec Show your Diagram/illustration. And indicate the formula used and given value.
1. A stone is thrown vertically upward from the ground with a velocity of 15 m/sec. One second later, another stone is thrown vertically upward with a velocity of 30 m/sec. a. When will the stones be at the same level? Ans. t = 1.4 sec b. How far above the ground will the stones be at the same level? Ans S =11.4 m c. Determine the time the second stone travelled until the stones are at the same level? Ans. t2 = 0.4 sec Please indicate the formula and what to find given value.