4. A target lies flat on the ground 3 m from the side of a building that is 10 m tall, as shown above. A student rolls a ball off the horizontal roof of the building in the direction of the target. Air resistance is negligible. What is the horizontal speed with which the ball must leave the roof if it is to strike the target? 18 m 4.0 m

4. A target lies flat on the ground 3 m from the side of a building that is 10 m tall, as shown above. A student rolls a ball off the horizontal roof of the building in the direction of the target. Air resistance is negligible. What is the horizontal speed with which the ball must leave the roof if it is to strike the target? 18 m 4.0 m

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 57P: In 1999, Robbie Knievel was the first to jump the Grand Canyon on a motorcycle. At a narrow part of...

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A projectile is launched at an angle of 30 and lands 20 s later at the same height as it was launched. (a) What is the initial speed of the projectile? (b) What is the maximum altitude? (c) What is the range? (d) Calculate the displacement from the point of launch to the position on its trajectory at 15 s.
In 1999, Robbie Knievel was the first to jump the Grand Canyon on a motorcycle. At a narrow part of the canyon (69.0 m wide) and traveling 35.8 m/s off the takeoff ramp, he reached the other side. What was his launch angle?
A stuntman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 10.0 m/s, and the man is initially 3.00 m above the level of the saddle. (a) What must be the horizontal distance between the saddle and the limb when the man makes his move? (b) How long is he in the air?
4. A person is standing 15.5 m from a target, which is at a height of 3.10 m. The person wishes to throw a ballso that it strikes the target. A ball is thrown with an initial velocity directed 40.0° above the horizontal. The ballis released from a point that is 1.90 m above the ground. What initial velocity is required in order for the ball tostrike the target?
the court is the tennis ball when it leaves the racket? Ans: 1.83 m SUL des Bud Question 3. A marble is thrown horizontally with a speed of 19.2 m/s from the top of a building. When it strikes the ground, the marble has a velocity that makes an angle of 39° with the horizontal. From what height above the ground was the marble thrown? Ans: 12.33 m lage vob Y Question 4. A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 640 the hullot strikes the target.
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1110. In Fig. P-1109, a ball thrown down the incline strikes it at a distance s 254.5 It. If the ball rises to a maximum height h 64.4 ft above the point of release, compute its initial velocity vo and inclination 6. Ans. v. = 80.5 ft per see; 0= 53.1° FIG. P-1109 and P-1110.
Task IV:In a baseball game, the ball hits the top of a wall that is 22 m high and located at 130m away from the thrower, if theball is hit at an angle 35to the horizontal, assume that the ball is hit at a height of 2 m above the ground. Find :a. The initial speed of the ballb. The time it takes the ball to reach the wallc. The velocity components and the speed of the ball when it reached the wall
3. A rescue plane flies at 90m/s (in the positive x- direction) at constant height h = 1000m toward a point directly over a victim, where a rescue capsule is to land. The capsule is released when the pilot's line of sight is at angle of o with respect to a vertical line as shown in the figure. 1ijetory Tte of sigln a. How long does it take of the capsule to reach the victim? b. How far ahead (distance along x) should the capsule be released? In othe words, what is the x-position of the victim in the figure.p