Concept explainers
At takeoff, a commercial jet has a 60.0 m/s speed. Its tires have a diameter of 0.850 m.
(a) At how many rev/min are the tires rotating?
(b) What is the centripetal acceleration at the edge of the tire?
(c) With what force must a determined
(d) Take the ratio of this force to the bacterium's weight.
Trending nowThis is a popular solution!
Chapter 6 Solutions
College Physics
Additional Science Textbook Solutions
University Physics Volume 2
College Physics: A Strategic Approach (4th Edition)
Conceptual Physics (12th Edition)
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
University Physics Volume 1
Tutorials in Introductory Physics
- At takeoff a commercial jet has a 70.0 m/s speed. Its tires have a diameter of 0.400 m. (a) At how many rpm are the tires rotating? rpm (b) What is the centripetal acceleration at the edge of the tire? m/s2 (c) With what force must a determined 10-15 kg bacterium cling to the rim? N (d) Take the ratio of this force to the bacterium's weight. |(force from part (c) / bacterium's weight) Additional Materials | Readingarrow_forwardWhen a fighter pilot makes a very quick turn, he experiences a centripetal acceleration. When this acceleration is greater than about 4 × g the pilot will usually lose consciousness (“black out”). Consider a pilot flying at a speed of 950 m/s who wants to make a very sharp turn. What is the minimum radius of curvature that he can take without blacking out?arrow_forwardThe maximum static coefficient of friction between the tires of a 2000 kg car and the road is lsmax 0.25. What is the maximum speed with which the car can make a turn of radius 50 m without skidding?arrow_forward
- At takeoff a commercial jet has a 50.0 m/s speed. Its tires have a diameter of 0.700 m. (a) At how many rpm are the tires rotating? rpm (b) What is the centripetal acceleration at the edge of the tire? m/s² (c) With what force must a determined 10-15 kg bacterium cling to the rim? |N (d) Take the ratio of this force to the bacterium's weight. | (force from part (c)/bacterium's weight)arrow_forwardHow fast (in rpm) must a centrifuge rotate if a particle 6.50 cm from the axis of rotation is to experience an acceleration of 120000 g's? If the answer has 4 digits or more, enter it without commas, e.g. 13500. Express your answer using three significant figures.arrow_forwardEngineers are designing a curved section of a highway to fit into a specific area. The curve has radius 121 m and is banked at an angle such that a car can travel around the curve at 28.7 m/s and stay on the road without the aid of a frictional force. Calculate the required banking angle (as measured above the horizontal). 0 =arrow_forward
- How fast (in rpm) must a centrifuge rotate if a particle 7.5 cm from the axis of rotation is to experience an acceleration of 2.0×105 g's? Express your answer using two significant figures.arrow_forwardA regulation basketball has a 44 cm diameter and may be approximated as a thin spherical shell. How long will it take a basketball starting from rest to roll without slipping 2.1 m down an incline that makes an angle of 16.6° with the horizontal? The acceleration of gravity is 9.81m/s². Answer in units of s.arrow_forwardHelicopter blades withstand tremendous stresses. In addition to supporting the weight of the helicopter, they are spun at rapid rates and experience large centripetal accelerations, especially at the tip. The tip of a 4.00 m long helicopter blade that rotates at 5 Hz. (a) What is the linear speed of the tip of the blade? (b) What is the centripetal acceleration at the tip? (c) How many g’s is this?arrow_forward
- What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 29 km/h and the ms between tires and track is 0.32?arrow_forwardHelicopter blades withstand tremendous stresses. In addition to supporting the weight of a helicopter, they are spun at rapid rates and experience large centripetal accelerations, especially at the tip. (For each answer, enter a number.) (a) Calculate the magnitude (in m/s) of the centripetal acceleration at the tip of a 3.40 m long helicopter blade that rotates at 295 rev/min. m/s? (b) Compare the linear speed of the tip with the speed of sound (taken to be 340 m/s). Vtip/Vsound =arrow_forwardA new car is tested on a 280-m-diameter track. If the car speeds up at a steady 1.5 m/s^2 , how long after starting is the magnitude of its centripetal acceleration equal to the tangential acceleration?arrow_forward
- An Introduction to Physical SciencePhysicsISBN:9781305079137Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar TorresPublisher:Cengage LearningGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill