College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- A Wide Reciever is running along the sideline straight towards the goal at a constant speed. When he is 27 m away from the goal line he cathces the ball, but theire is a cornerback 12 m behind him moving with a connstant speed of vc=9.0 m/s what speed should the wide reveiver have to make sure he reaches the goal line just as the cornerback reaches him.arrow_forwardA North American river otter wants to cross the North Saskatchewan river. It can swimat a speed of 2.75 m/s. In that location, the distance directly across the river is 45.0 mand the current velocity is 2.5 m/s. a) How much time does the otter take to get to the other side, if it points directlyacross the river? b) How many metres downstream will the current have carried the otter when itgets to the other side? c) Calculate the otter’s velocity, relative to the bank from where it started.arrow_forwardAteation Accelexaten Can be deksmined Gram (muliele Arsuas) A) eqations of Censtant acceleration in the arceleration onslant. b equations of canstant aceleraton vegard less e the acceleration. 8S Constant. ) Slope of velocdy Versus fime Slope of posilion Veasus fime €) An accelecation VS Time giaph 0 froma thaical vake if he mokon s pakeble ar freefall.arrow_forward
- A ball is thrown upward from the top of a 24 m tall building. The ball’s initial speed is12 m/s. At the instant, a person is running on the ground at a distance of 31 m fromthe building. What must be the average speed of the person if he is to catch the ballat the bottom of the building?arrow_forwardAn accelerating Cheetah reaches a velocity of 25 m/s in 4.5s after which it immediately begins to slow down. What is its acceleration and what is its effective striking range (ie., what distance does it cover)?arrow_forwardA particle is moving in a straight line according to the position function s(1) = 1 - 612 +9t +5, 120, where s is measured in metres and t in se ɔnds. a) Find the average acceleration in the first 3 seconds. b) The particle changes direction twice. When does that happen? c) How far away, from the starting point, is the particle at 1 = 3? d) The particle brakes once. When does that happen? : e) Find the total distance travelled before braking occurs. (*arrow_forward
- On your way back from the lake, you’re worst friend is driving and trying to post some stupid selfies toInstagram. Just then, you look up to see a train approaching the crossing near the Roadhouse Grilltravelling at 30 m/s, 60 m from the train crossing. You’re traveling 20 m/s at a distance of 45 m away andyour “friend” decides (foolishly) to punch it and try to beat the train. If his reaction time is half a second,what minimum acceleration does the car need to avoid certain calamity? [4.4 m/s2]arrow_forwardA solid steel ball is thrown directly downward, with an initial speed of 8.45 m/s, from the top of a building at a height of 30.2 m. How much time (in s) does it take before striking thes ground? Need Help? Read Itarrow_forwardOn the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free- fall acceleration on the moon is 1/6 of its value on earth. Suppose he hit the ball with a speed of 29 m/sm/s at an angle 36 ⁰⁰ above the horizontal. A) How long was the ball in flight? B) How far did it travel? C) Ignoring air resistance, how much farther would it travel on the moon than on earth?arrow_forward
- You drive West 30.0 km at 85 km/h and then drive East another 60.0 km at 95 km/h. Your average velocity for the entire drive will be... How would I go about solving this problem?arrow_forwardOn the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/61/6 of its value on earth. Suppose he hit the ball with a speed of 28 m/sm/s at an angle 31o above the horizontal. Express your answer using two significant figures. (a) How long was the ball in flight?(b) How far did it travel?(c) How much farther would it have traveled on the moon than on earth?arrow_forwardA particle is moving with a velocity of 60m/s in the positive x-direction at t = 0s. Between t = 0s andt = 15s, the velocity decreases uniformly to zero. What was the acceleration during this 15s interval? Whatis the signi cance of the sign of your answer?arrow_forward
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