Related questions
Question
Transcribed Image Text:Problem 2. The speed of a motorhoat in still waler is lour times the speed of a river.
Normally, ihe motorboat takes one minute to cross the river to the port straight across
on the other bank. One time, duc to a motor problem, it was not able to run at full
power, and it took four minutes to cross the river along the same path. By what facior
was the specd of the hoat in still water reduced? (Assume that the speed of the water is
uniform throughout the whole width of the river.)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by stepSolved in 3 steps with 3 images
Knowledge Booster
Similar questions
- simple device for measuring yourreaction time. It consists of a cardboard strip marked with a scaleand two large dots. A friend holds the strip vertically, with thumband forefinger at the dot on the right in, being careful not to touch the strip. Your friend releasesthe strip, and you try to pinch it as soon as possible afteryou see it begin to fall.The mark at the place where you pinch thestrip gives your reaction time. (a) How far from the lower dotshould you place the 50.0 ms mark? How much higher shouldyou place the marks for (b) 100, (c) 150, (d) 200, and (e) 250 ms?(For example, should the 100 ms marker be 2 times as far fromthe dot as the 50 ms marker? If so, give an answer of 2 times. Canyou find any pattern in the answers?)arrow_forwardYou can accelerate and brake on your bicycle with a maximum magnitudeof the acceleration of 3 (m/s)/s. Your top speed is 12 m/s. You want to drop ofyour physics textbook at your friend who normally works with an electronictextbook version, but just called and asked you for your printed copy for theafternoon. She lives 168m up the road from you. You need 11 seconds to runout of your apartment and grab your bike, and you need another 11s to run toyour friend’s apartment door to hand her the book after stopping with your bike.How long to you need in total to bring her the book?arrow_forwardPlease answer this with in 30 mins ! I will upvote ! Question: A Boston Red Sox player hits the ball at a 15 degree angle with an initial speed of 145 feet per second. The bat is 3 feet from the ground at the time of impact. The "Green Monster, the left field wall in Fenway Park, is 315 feet from home plate How high will the ball be in feet when it reaches the wall? Round to the nearest hundredtharrow_forward
- A 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_forwardProblem 3: Luild cuvved or banhed to engincer propoaes roud. Banking VAn is suoh thent at cerrain Speed, frichion ut all is neede od Gor the no car to move the curve. the be bunhad> should cur what anyle V =25mls r= 250 m re25mlsarrow_forwardWhen last we left our friend Wile E. Coyote (SuperGenius), was peeling himself off a canyon wall and none the worse for wear. This time, he has obtained an Acme^ TM rocket-powered dragster with the AcmeTM Premium Parachute Braking System (patent pending)Starting from restthe dragster accelerates at a constant rate of 36.4 m/s ^ 2 for 14 seconds. At this point, the coyote realizes that he has passed the Road Runner and so he instantly cuts off the engine and deploys his braking system - which doesn't work. He therefore travels an additional distance of 1800 m at constant velocity until again becoming one with a canyon wall. Determine: (a) The total time for Wile E. Coyote's motion described above; on (b) The total distance covered by Wile E. Coyote's motion described above ; (c) The average velocity for Wile E. Coyote's motion described above.arrow_forward
- 4. A daring swimmer drives off a cliff with a running horizontal leap, as shown in the figure. What must her minimum speed be as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?arrow_forwardi cant figure out these two partsarrow_forwardOn a hot day in the flats, thetemperature is 106.2 degrees. A driver finds anempty, flat stretch of desert that is 1913 meterslong and decides to push the limits of his car. He finds the car can accelerate from O to 60 mph(26.8 m/s) in 4.95 s. Now he wants to see howfast the car can go. Assume the car maintains thesame average acceleration until it reaches its tokspeed of 87.9 m/s. (a) How long will it take the car to reach its topspeed?(b) How far will the car travel before it reaches itstop speed?arrow_forward
arrow_back_ios
arrow_forward_ios