
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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A 734 kg formula 1 race car hits its top speed of 325 km/h. What is the kinetic energy of the car at that moment?
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- A person is 170 cm tall. He holds a 10 kg object on his head for 10 minutes. How much work is done on the object?arrow_forwardA 50kg student traveling in a car with a constant velocity has a kinetic energy of 1.2 × 10^4J .What is the speedometer reading of the car in km/h?arrow_forwardReleasing some frustration at the end of the semester, you throw your physics book (mass of 4.3 kg) off of a 24 m tall building. You throw your book so that it has a speed of 3 m/s right after you let go. What is the kinetic energy of your book after you let go? (in J) 12.9 1.01×103 206 0 19.4 How how fast is your textbook moving right before it lands? For now, ignore friction. (in m/s) 21.9 17.5 24.7 21.5 If friction is NOT negligible, and 350 J of the textbook's energy is converted to thermal energy as it falls, how fast is it moving just before it lands? (in m/s) 17.8 17.5 12.8 25.3 25.0arrow_forward
- A woman runs up a flight of stairs. The gain in her gravitational potential energy is 1000 J. If she runs up the same stairs at half the speed, her gain in gravitational potential energy will be . . . Group of answer choices 500 J 2000 J 100 J 1000 Jarrow_forwardA 72 kg student traveling in a car with a constant velocity has a kinetic energy of 2.0 104 J. What is the speedometer reading of the car in km/h?arrow_forwardAn object of mass 2.0 kg is dropped from a height of 1.0 metres. It lands with a speed of 1.8 m/s. How much energy was lost due to air resistance? (Give your answer to 2 s.f., expressed as a magnitude) Your Answer: Answerarrow_forward
- A bride tosses a bouquet of flower through the air with a speed of 2.7 m/s, and it smacks one of her guests in the face. How much kinetic energy does the 0.55 kg flower bouquet have? Answer:arrow_forwardPoint Height (y) (m) Speed (v) (m/s) Potential Energy (J) Kinetic Energy (J) Mechanical Energy (round off to the nearest thousands) A 8 m 0 m/s 3430 J 0 J 3000 J B 3 m 8.8 m/s 1470 J 1936 J 3000 J C 2 m 9.9 m/s 980 J 2450 J 3000 J - Calculate the ratio of the mechanical energy at B and mechanical energy at A (EB/EA) and (EC/EB). What do these ratios tell you about the conservation of energy? - Is the mechanical energy conserved between A and B? Explain. - Is the mechanical energy conserved between B and C? Explainarrow_forward
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