Bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground with a long measuring tape. Bob is a pitcher, and knows that the fastest he can throw the ball is v0 = 81.0 mph. Bob starts the stopwatch as he throws the ball (with no way to measure the ball's initial trajectory) and watches carefully. The ball rises and then falls, and after t₁ = 0.710 s, the ball is once again level with Bob. Bob cannot see well enough to time when the ball hits the ground. Bob's friend then measures that the ball landed a distance of x = 365 ft from the base of the cliff. How high up is Bob if the ball started from exactly 5 ft above the edge of the cliff? Vo height of the cliff: 5 ft

Bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground with a long measuring tape. Bob is a pitcher, and knows that the fastest he can throw the ball is v0 = 81.0 mph. Bob starts the stopwatch as he throws the ball (with no way to measure the ball's initial trajectory) and watches carefully. The ball rises and then falls, and after t₁ = 0.710 s, the ball is once again level with Bob. Bob cannot see well enough to time when the ball hits the ground. Bob's friend then measures that the ball landed a distance of x = 365 ft from the base of the cliff. How high up is Bob if the ball started from exactly 5 ft above the edge of the cliff? Vo height of the cliff: 5 ft

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.

Question

Bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climbed. All he has to use,
however, is a baseball, a stopwatch, and a friend on the ground with a long measuring tape. Bob is a pitcher, and knows that the
fastest he can throw the ball is vo = 81.0 mph. Bob starts the stopwatch as he throws the ball (with no way to measure the ball's
initial trajectory) and watches carefully. The ball rises and then falls, and after t₁ = 0.710 s, the ball is once again level with
Bob. Bob cannot see well enough to time when the ball hits the ground. Bob's friend then measures that the ball landed a
distance of x = 365 ft from the base of the cliff. How high up is Bob if the ball started from exactly 5 ft above the edge of
the cliff?
ft
height of the cliff:
1₁
Vo
5 ft

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