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aneed of 20. meters per second (4) four times as great (3) one-fourth as great 2m and speed v, and block B having mass lass m and speed 2v. 2m A 2v 777 Frictionless surface kinetic energy of block B is (1) the same (2) twice as great

aneed of 20. meters per second (4) four times as great (3) one-fourth as great 2m and speed v, and block B having mass lass m and speed 2v. 2m A 2v 777 Frictionless surface kinetic energy of block B is (1) the same (2) twice as great

College Physics
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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please please help with questions 26,27,28,29,30 and 31
accelerating a 20.-newton object from rest across speed 2v. 2m В Frictionless surface Compared to the kinetic energy of block A th kinetic energy of block B is (1) the same (2) twice as great (3) one-fourth as great (4) four times as great object is (1) 1.0 kg (2) 2.0 kg (3) 0.50 kg (4) 40, ko 28 A total of 10.0 joules of work is done in a horizontal frictionless table. What is the total kinetic energy gained by the object? (1) 0.0 J 29 A baseball bat strikes a ball with a force with a magnitude of 2.0 × 10* newtons. If the bat stays in contact with the ball for a distance of 5.0 x 10-3 meter, what kinetic energy will the ball (2) 2.0 J (3) 10. J (4) 200J acquire from the bat? (1) 1.0 × 10² J (2) 2.0 × 10² J 30 An object 8 meters above the ground has Z joules of gravitational potential energy with respect to the ground. If the object falls freely, how many joules of kinetic energy will it have gained when it is 4 meters above the ground? (1) Z (3) 2.5 x 10' J (4) 4.0 × 102 J (2) 2Z (3) (4) 0 31 A girl rides an escalator that moves her upward at constant speed. As the girl rises, how do her kinetic energy and gravitational potential energy with respect to the bottom of the escalator change? (1) Kinetic energy decreases and potential energy decreases. (2) Kinetic energy decreases and potential energy increases. (3) Kinetic energy remains the same and potential energy decreases. (4) Kinetic energy remains the same and potential energy increases.
Transcribed Image Text:accelerating a 20.-newton object from rest across speed 2v. 2m В Frictionless surface Compared to the kinetic energy of block A th kinetic energy of block B is (1) the same (2) twice as great (3) one-fourth as great (4) four times as great object is (1) 1.0 kg (2) 2.0 kg (3) 0.50 kg (4) 40, ko 28 A total of 10.0 joules of work is done in a horizontal frictionless table. What is the total kinetic energy gained by the object? (1) 0.0 J 29 A baseball bat strikes a ball with a force with a magnitude of 2.0 × 10* newtons. If the bat stays in contact with the ball for a distance of 5.0 x 10-3 meter, what kinetic energy will the ball (2) 2.0 J (3) 10. J (4) 200J acquire from the bat? (1) 1.0 × 10² J (2) 2.0 × 10² J 30 An object 8 meters above the ground has Z joules of gravitational potential energy with respect to the ground. If the object falls freely, how many joules of kinetic energy will it have gained when it is 4 meters above the ground? (1) Z (3) 2.5 x 10' J (4) 4.0 × 102 J (2) 2Z (3) (4) 0 31 A girl rides an escalator that moves her upward at constant speed. As the girl rises, how do her kinetic energy and gravitational potential energy with respect to the bottom of the escalator change? (1) Kinetic energy decreases and potential energy decreases. (2) Kinetic energy decreases and potential energy increases. (3) Kinetic energy remains the same and potential energy decreases. (4) Kinetic energy remains the same and potential energy increases.
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