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Chapter 3: Q54P (page 60)

A ball is to be shot from level ground with a certain speed. Figure 4-45 shows the range Rit will have versus the launch angle胃0. The value of胃0determines the flight time; lettmaxrepresent the maximum flight time. What is the least speed the ball will have during its flight if胃0is chosen such that flight time is0.500tmax?

Short Answer

Expert verified

Least speed of the ball at given condition42.0m/s

Step by step solution

01

Given

From the graph we can say that maximum range of projectile is240m which can be reaching by it only when launching angle is 45掳.

02

Understanding the concept

First, find the time to reach the maximum height for the object. We know that at the maximum height the object has only horizontal velocity component. Its vertical will be zero. So,the angle for half of maximum height can be found. After that from the graph we can conclude the initial velocity of object.\

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