has a kinetic energy of 400. joules. The mass of the accelerating a 20.-newton object from rest across (2) 2.0 kg (3) 0.50 kg (4) 40. kg a object is (1) 1.0 kg 28 A total of 10.0 joules of work is done in (2) 2.0 kg (3) 0.50 kg (4) 40. ke a horizontal frictionless table. What is the total kinetic energy gained by the object? (1) 0.0J (2) 2.0 J (3) 10. J (4) 200J 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 acquire from the bat? (1) 1.0 x 10² J (2) 2.0 x 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 (3) 2.5 x 10' J (4) 4.0 x 102 J

has a kinetic energy of 400. joules. The mass of the accelerating a 20.-newton object from rest across (2) 2.0 kg (3) 0.50 kg (4) 40. kg a object is (1) 1.0 kg 28 A total of 10.0 joules of work is done in (2) 2.0 kg (3) 0.50 kg (4) 40. ke a horizontal frictionless table. What is the total kinetic energy gained by the object? (1) 0.0J (2) 2.0 J (3) 10. J (4) 200J 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 acquire from the bat? (1) 1.0 x 10² J (2) 2.0 x 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 (3) 2.5 x 10' J (4) 4.0 x 102 J

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Conservation Of Energy

Section: Chapter Questions

Problem 8.10CQ: In Chapter 7, the work-kinetic energy theorem, W = K, was introduced. This equation states that work...

See similar textbooks

Similar questions

A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30s?
An a simple pendulum swings back and forth, the forces acting on the suspended object are (a) the gravitational force, (b) the tension in the supporting cord, and (c) air resistance, (i) Which of these forces, if any, does no work on the pendulum at any time? (ii) Which of these forces does negative work on the pendulum at all Limes during its motion?
A particle of mass 2.0 kg moves under the influence of the force F(x)=(5x2=7x)N . Suppose a frictional force also acts on the particle. If the particle’s speed when it starts at x=4.0 m is 0.0 m/s and when it arrives at x=4.0 m is 9.0 m/s, how much work is done on it by the frictional force between x=4.0 m and x=4.0 m?
Describe a situation in which a force is exerted for a long time but does no work. Explain.
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
Ignoring details associated with friction, extra forces exerted by arm and leg muscles, and other factors, we can consider a pole vault as the conversion of an athlete’s running kinetic energy to gravitational potential energy. If an athlete is to lift his body 4.8 m during a vault, what speed must he have when he plants his pole?
Give an example of something we think of as work in everyday circumstances that is not work in the scientific sense. Is energy transferred or changed in form in your example? If so, explain how this is accomplished without doing work.
An electric scooter has a battery capable of supplying 120 Wh of energy. If friction forces and other losses account for 60.0% of the energy usage, what altitude change can a rider achieve when driving in hilly ter-rain if the rider and scooter have a combined weight of 890 N?
Integrated Concepts (a) Calculate the force the woman in Figure 7.46 exerts to do a push-up at constant speed, taking all data to be known to three digits. (b) How much work does she do if her center of mass rises 0.240 m? (c) What is her useful power output if she does 25 push-ups in 1 min? (Should work done lowering her body be included? See the discussion of useful work in Work, Energy, and Power in Humans. Figure 7.46 Forces involved in doing push-ups. The woman's weight acts as a force exerted downward on her center of gravity (CG).
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
In a Coyote/Road Runner cartoon clip (https://openstaxcollege.org/l/21coyroadcarcl), a spring expands quickly and sends the coyote into a rock. If the spring extended 5 m and sent the coyote of mass 20 kg to a speed of 15 m/s, (a) what is the spring constant of this spring? (b) If the coyote were sent vertically into the air with the energy given to him by the spring, how high could he go if there were no non-conservative forces?
The force acting on a panicle varies as shown in Figure la P7.14. Find the work done by the force on the particle as it moves (a) from x = 0 to x = 8.00 m. (b) from x = 8.00 m to x = 10.0 m, and (c) from x = 0 to x = 10.0 m.