13. 2.8 Spy Hunter 8 Special Agent Smith is aboard a secret government train which is moving at a constant speed of 13.5 m/s having just retrieved an experimental explosive from some enemy spies. However, the explosive has been activated with no way to turn it off. Smith runs at a speed of 4.2 m/s toward the back of the train. When she reaches the middle of the last car, while she is still running, Smith throws the explosive at an angle which she observes to be 68° with the track. Just after reaching the peak of its trajectory, the explosive explodes extremely dramatically. A reporter watching the scene unfold from the side of the tracks observes the explosive moving vertically with no horizontal motion (i.e. there is no velocity in the x-direction from the perspective of the reporter). How high does the reporter see the explosive rise? Give your answer in m. Enter answer here 4 A playground is on the roof of a city school which is 10.1 m above the street (see figure below). The vertical wall of the school is h = 10.9 m above the ground, forming a 0.8 m railing around the playground. A student accidently knocked a ball onto the street below. A passerby returns it by kicking it at an angle of 65.0 deg to the ground d = 22.0 m from the wall. The ball takes t₁ = 2.6s to reach a point directly above the front wall of the school. +y 10.9 m- 65° +x 22 m Find the speed at which the ball was launched in m/s. (Please give your answer to one decimal place to reduce error in later questions) Enter answer here B. 2.5 Trapeze 5 You are the receiver in a trapeze duo and you are practicing your timing. Your partner, the jumper, releases when his swing is at 45 deg so that he flies through the air at a speed of 3 m/s. You catch him at the top of his trajectory and when your swing is also at 45 deg. The swings are identical and follow the same trajectory from -45 deg to +45 deg. How much later must you begin your swing than your partner to complete the stunt? Plese give your answer in s. Enter answer here

13. 2.8 Spy Hunter 8 Special Agent Smith is aboard a secret government train which is moving at a constant speed of 13.5 m/s having just retrieved an experimental explosive from some enemy spies. However, the explosive has been activated with no way to turn it off. Smith runs at a speed of 4.2 m/s toward the back of the train. When she reaches the middle of the last car, while she is still running, Smith throws the explosive at an angle which she observes to be 68° with the track. Just after reaching the peak of its trajectory, the explosive explodes extremely dramatically. A reporter watching the scene unfold from the side of the tracks observes the explosive moving vertically with no horizontal motion (i.e. there is no velocity in the x-direction from the perspective of the reporter). How high does the reporter see the explosive rise? Give your answer in m. Enter answer here 4 A playground is on the roof of a city school which is 10.1 m above the street (see figure below). The vertical wall of the school is h = 10.9 m above the ground, forming a 0.8 m railing around the playground. A student accidently knocked a ball onto the street below. A passerby returns it by kicking it at an angle of 65.0 deg to the ground d = 22.0 m from the wall. The ball takes t₁ = 2.6s to reach a point directly above the front wall of the school. +y 10.9 m- 65° +x 22 m Find the speed at which the ball was launched in m/s. (Please give your answer to one decimal place to reduce error in later questions) Enter answer here B. 2.5 Trapeze 5 You are the receiver in a trapeze duo and you are practicing your timing. Your partner, the jumper, releases when his swing is at 45 deg so that he flies through the air at a speed of 3 m/s. You catch him at the top of his trajectory and when your swing is also at 45 deg. The swings are identical and follow the same trajectory from -45 deg to +45 deg. How much later must you begin your swing than your partner to complete the stunt? Plese give your answer in s. Enter answer here

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 51P: In an attempt to escape a desert island, a castaway builds a raft and sets out to sea. The wind...

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