The velocity of the projectile (red arrows) changes in direction and magnitude, but its acceleration (purple arrows) remains constant. y Target ------ Line of sight Xr tan 0; Point of Gun collision Ут Figure 4.13 (Example 4.3) (a) Multiflash photograph of the projectile-target demonstration. If the gun is aimed directly at the target and is fired at the same instant the target begins to fall, the projectile will hit the target. (b) Schematic diagram of the projectile-target demonstration. Charles D. Winters

The velocity of the projectile (red arrows) changes in direction and magnitude, but its acceleration (purple arrows) remains constant. y Target ------ Line of sight Xr tan 0; Point of Gun collision Ут Figure 4.13 (Example 4.3) (a) Multiflash photograph of the projectile-target demonstration. If the gun is aimed directly at the target and is fired at the same instant the target begins to fall, the projectile will hit the target. (b) Schematic diagram of the projectile-target demonstration. Charles D. Winters

University Physics Volume 1

18th Edition

ISBN:9781938168277

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

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

Chapter4: Motion In Two And Three Dimensions

Section: Chapter Questions

Problem 22P: New York Rangers defenseman Daniel Girardi stands at the goal and passes a hockey puck 20 m and 45...

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Concept explainers

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

Question

In a popular lecture demonstration, a projectile is aimed directly at a target and fired in such a way that the projectile leaves the gun at the same time the target is dropped from rest. Show that the projectile hits the falling target.

The velocity of the projectile (red
arrows) changes in direction and
magnitude, but its acceleration
(purple arrows) remains constant.
y
Target
------
Line of sight
Xr tan 0;
Point of
Gun
collision
Ут
Figure 4.13 (Example 4.3) (a) Multiflash photograph of the projectile-target demonstration. If the gun
is aimed directly at the target and is fired at the same instant the target begins to fall, the projectile will
hit the target. (b) Schematic diagram of the projectile-target demonstration.
Charles D. Winters

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