   Chapter 3, Problem 17P

Chapter
Section
Textbook Problem

A projectile is launched with an initial speed of 60.0 m/s at an angle of 30.0° above the horizontal. The projectile lands on a hillside 4.00 s later. Neglect air friction, (a) What is the projectile’s velocity at the highest point of its trajectory? (b) What is the straight-line distance from where the projectile was launched to where it hits its target?

(a)

To determine
The velocity of the projectile at the highest point of its trajectory.

Explanation

For a projectile, at the highest point of the trajectory, the vertical component of the velocity is zero.

The horizontal component of the velocity is,

vx=v0x=v0cosθ

Substitute 60.0m/s for v0 and 30

(b)

To determine
The straight line distance from where the projectile was launched to where it hits its target.

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