Question 99 of 15ReviewHumpback whales sometimes catch fish by swimming rapidly in a circle, blowing a curtain of bubbles that confuses a school of fish and traps it in a small area, where the whales caneasily catch and eat them. Suppose a 25,000-kg humpback whale swims at 2.2 m/s in a circle of radius 9.0 m.Part AWhat centripetal force must the whale generate?Express your answer to three significant figures and include appropriate units.ValueSubmitRequest Answer

When an object of mass M is moving with a speed v in a circular path of radius r, amount of…

Answered: Humpback whales sometimes catch fish by…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Consider two cars, a 1,700 kg BMW and a 1,500 kg Mercedes-Benz. The BMW is speeding along at 120 km/h and the Mercedes-Benz is going half the speed at 60 km/h. If the two cars brake to a stop with the same constant acceleration, a. Is the amount of time required to come to a stop influenced by their initial velocity? Explain your answer using diagrams, equations, or any explanatory rules/principle b. Is the distance travelled prior to stopping influenced by their initial velocity? Explain your answer using diagrams, equations, or any explanatory rules/principles
A rocket takes off from Earth's surface, accelerating straight up at 75.2 m/s. Calculate the normal force (in N) acting on an astronaut of mass 85.4 kg, including her space suit. (Assume the rocket's initial motion parallel to the +y-direction. Indicate the direction with the sign of your answer.) HINT N
Two blocks with masses mд and m³ are connected by a massless string over a massless, frictionless pulley. Block B, which is more massive than block A, is released from height h and falls. Part A Write an expression for the speed of the blocks just as block B reaches the ground. Express your answer in terms of some, all, or none of the variables mÃ, m³, h, and the free-fall acceleration g. V = Submit Part B xa h = Submit Π ΑΣΦ 0 Xb 016 μᾶ a Request Answer Value √x vx x 18 A 1.0 kg block and a 2.0 kg block are connected by a massless string over a massless, frictionless pulley. The impact speed of the heavier block, after falling, is 1.4 m/s. From how high did it fall? Express your answer with the appropriate units. Request Answer Units <४ = |X| www ? X.10n
You're driving home from the grocery store at 12 m/s with a 7.0 kg bag of groceries on the front seat when the light ahead turns red. Part A What is the shortest distance in which you can stop, after the brakes are applied, without the groceries sliding off the seat? The static and kinetic coefficients of friction are, respectively, 0.65 and 0.45. Assume that the surface of the seat is horizontal. Express your answer with the appropriate units. ► View Available Hint(s) Ax= HÅ Value Units ?
Part E Problem: Thinking and Investigation 44. In testing a new material to be used in non-slip door mats. Scientists made a mat made of this new material, and did the following experiment. A force (F) was used to pull a wooden block across the mat as shown below.(5) m μ The size of the force was varied and the data table below shows the size of the force and the block's resulting acceleration. F(N) (m/s²) 20 0.25 25 0.85 30 1.35 35 1.95 Plot the data on the graph below and draw a line of best fit. Extend the line back to the 'y' axis so that you have a y-intercept point and determine the slope of the line. F (N) The industrial standard for the coefficient of friction for non-slip mats is 0.85. a) Using your slope value and your y-intercept value from the graph, determine the coefficient of friction between the block and the mat. b) Would this mat be approved for production based on its coefficient of friction? Briefly explain. 11 of
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A 0.280 kg potato is tied to a string with length 2.10 m, and the other end of the string is tied to a rigid support. The potato is held straight out horizontally from the point of support, with the string pulled taut, and is then released. Part A What is the speed of the potato at the lowest point of its motion? Express your answer in meters per second. VE ΑΣΦ V = Submit Part B Request Answer What is the tension in the string at this point? Express your answer in newtons. ΠΑΣΦ T = ? www. ? m/s N
Determine the velocity of the crate when t = 4 s. Express your answer to three significant figures and include the appropriate units. The coefficient of kinetic friction between the 55-kg crate and the ground is μk = 0.3. The crate starts from rest, and P = 240 N. (Figure 1) Part A Figure 30° ✓ 1 of 1 НА ? v = Value Units Submit Request Answer Part B Determine the distance the crate travels when t = 4 s. Express your answer to three significant figures and include the appropriate units. НА ? 8 = Value Units Submit Request Answer Provide Feedback
A rocket with a mass of 2.70x106 kg exerts a vertical force of 3.40×107 N on the gases it expels. ▼ Part A Determine the acceleration of the rocket. Assume g remains constant, and ignore the mass of gas expelled (not realistic). Express your answer using two significant figures. VE ΑΣΦ Submit Dart R Request Answer ? m/s²
An 8.00 kg crate sits on an inclined plane that is inclined at 33.0 above the horizontal. The coefficient of kinetic friction between the crate and the surface of the plane is 0.300. A constant horizontal force F = 28.0 N is applied to the crate (Figure 1), and the crate moves down the plane. Part A If the crate is initially at rest, find its speed 2.00s after the force is applied? Express your answer with the appropriate units. HA Value Units Figure 1 of 1> Submit Request Answer Provide Feedback F 33.0°
Part C Rank the automobiles based on the magnitude of the force needed to stop them, from largest to smallest. Rank from largest to smallest. To rank items as equivalent, overlap them. If the ranking cannot be determined, check the box below. > View Available Hint(s) Reset H 1000 kg 500 kg 500 kg 4000 kg 1000 kg 2000 kg 20 m/s 10 m/s 20 m/s 5 m/s 10 m/s 5 m/s largest smalle:
Two 150 kg lead spheres are suspended from 100-m-long massless cables. The tops of the cables have been carefully anchored exactly 1 m apart. Part A By how much is the distance between the centers of the spheres less than 1 m? Express your answer to two significant figures and include the appropriate units. Ax = ¹"¯μA Value Units ?

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