12-90. Show that the girl at A can throw the ball to theboy at B by launching it at equal angles measured up ordown from a 45° inclination. If va = 10 m/s, determinethe range R if this value is 15°, i.e., 6, = 45° – 15° = 30°and 02 = 45° + 15° = 60°. Assume the ball is caught at thesame elevation from which it is thrown.VA = 10 m/sAB-R

GivenvA=10 m/sθ1=45°-15°=30°θ2=45°+15°=60°

Answered: 12-90. Show that the girl at A can thr…

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12-90. Show that the girl at A can thr boy at B by launching it at equal angle down from a 45° inclination. If va = 1

University Physics Volume 1

18th Edition

ISBN:9781938168277

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

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

Chapter2: Vectors

Section: Chapter Questions

Problem 2.12CYU: Check Your Understanding For vector in a rectangular coordinate system, use Equation 2.29 through...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

12-90. Show that the girl at A can throw the ball to the
boy at B by launching it at equal angles measured up or
down from a 45° inclination. If va = 10 m/s, determine
the range R if this value is 15°, i.e., 6, = 45° – 15° = 30°
and 02 = 45° + 15° = 60°. Assume the ball is caught at the
same elevation from which it is thrown.
VA = 10 m/s
A
B
-R

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