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- A student at the top of a building of height h throws one ball upward with a speed of i and then throws a second ball downward with the same initial speed i. Just before it reaches the ground, is the final speed of the ball thrown upward (a) larger, (b) smaller, or (c) the same in magnitude, compared with the final speed of the ball thrown downward?9 - If a ball is thrown from a height of 30m at a speed of 8 m/s, what is the speed of the ball when it hits the ground? A) 25.77 m/s B) 19,6 m/s C) 19,6 m/s^2 D) 25.77 m/s^2 E) 8 m/sQUESTION 7 Which two of the following objects have the same speed? An object travels 40 meters in 10 seconds. An object travels 40 meters in 5 seconds. An object travels 20 meters in 10 seconds. An object travels 20 meters in 5 seconds. QUESTION 8 OUI
- 9. A cyclist approaches the bottom of a gradual hill at a speed of 11 m/s. The hill is 3 m high and the cyclist estimates that she is going fast enough to coast up and over it without pedaling. Ignoring air resistance and friction, find the speed at which the cyclist crests the hill. Answer: .......2. An object of mass 200 g (0.2 kg) is thrown vertically upwards with a velocity of 8 m/s from a height of 10 m above the ground. It reaches certain maximum height and falls straight back to ground. Ignore air resistance in this problem. (a) Draw v-t graph that represents the velocity of the object after it is launched upwards and until it hits the ground. (b) How long does it take for the object to reach the maximum height? (c) What is the maximum height of the object from the ground? (d) How long does it take for the object to reach the ground from the highest point of motion? (e) What is the velocity of the object as it reaches ground? (Hint: Not zero).A ball is thrown vertically upward at t = 0, with an initial speed of vo = 10 m/s from a point O. The point O is 3 m above the ground. The ball reaches its maximum height at point A. Neglect air resistance. What is the vertical displacement, AyoA = ? (Take g = 10 m/s²) a) 20 m b) 15 m c) 10 m d) 5 m e) 1 m A Vo = 10 m/s 3 m В
- 1- Need help with the following Physics question, please and thank you!According to Guinness, the tallest man to have ever lived was Robert Pershing Wadlow of Alton, Illinois. He was last measured in 1940 to be 2.72 meters tall (8 feet, 11 inches). Determine the speed which a quarter would have reached before contact with the ground if dropped from rest from the top of his head.10-) Solve it with explain.Please make calculations right.
- 17) A rock is dropped off a cliff and strikes the ground with a speed of 30 m/s. How high was the cliff? a) 15.2 b) 30.4 c) 45.6 d) 60.85. With what velocity will a stone strike the ground if dropped from the top of a building 400 ft. high, With what velocity will the stone in strike the ground if thrown vertically downward with an initial velocity of 36ft/sec? use integration to solve this problem14-13. The 2-lb brick slides down a smooth roof, such that when it is at A it has a velocity of 5 ft/s. Determine the speed of the brick just before it leaves the surface at B, the distance d from the wall to where it strikes the ground, and the speed at which it hits the ground. Prob. 14-13 15 ft 30 ft A 5 ft/s y B d x