A car accelerates from rest to a maximum speed of 20 m/s over a 20 s time interval. The net force on the car as a function of time is given by Fnet = 3350 (t + 1)-1/2 where Fnet is measured in N and t goes from 0 to 20 s. Multiple Choice Questions: 7) What is the impulse on the car as it accelerates from rest to its top speed? a) 1.8 × 104 N s b) 2.4 × 104 N. s c) 3.8 × 104 N s d) 4.1 x 104 N. S e) 5.8 × 104 N. s f) 8.5 × 104 N. s 8) Assume that the wheels on the car each have a diameter of 49 cm and that the outside edge of the wheel spins with a tangential velocity of 20 m/s. If each of the wheels has a moment of inertia I = 0.75 kg. m², how much rotational kinetic energy does a single wheel have while traveling at this speed? a) O J c) b) 120 J d) 478 J 1913 J Short Answer Question (6 points) e) 2499 J f) 7653 J
A car accelerates from rest to a maximum speed of 20 m/s over a 20 s time interval. The net force on the car as a function of time is given by Fnet = 3350 (t + 1)-1/2 where Fnet is measured in N and t goes from 0 to 20 s. Multiple Choice Questions: 7) What is the impulse on the car as it accelerates from rest to its top speed? a) 1.8 × 104 N s b) 2.4 × 104 N. s c) 3.8 × 104 N s d) 4.1 x 104 N. S e) 5.8 × 104 N. s f) 8.5 × 104 N. s 8) Assume that the wheels on the car each have a diameter of 49 cm and that the outside edge of the wheel spins with a tangential velocity of 20 m/s. If each of the wheels has a moment of inertia I = 0.75 kg. m², how much rotational kinetic energy does a single wheel have while traveling at this speed? a) O J c) b) 120 J d) 478 J 1913 J Short Answer Question (6 points) e) 2499 J f) 7653 J
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter8: Momentum And Collisions
Section: Chapter Questions
Problem 47P: A model rocket engine has an average thrust of 5.26 N. It has an initial mass of 25.5 g, which...
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