15. A 12 kg crate is pushed up an incline from point A to point B as shown in the figure: B 7.5 m 2.5 m The height of the points A and B from the ground are given in the figure. What is the change in the gravitational potential energy of the crate? A. 590J B. -590] C. 950] D. -950 J
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![15. A 12 kg crate is pushed up an incline from
point A to point B as shown in the figure: B 7.5
m 2.5 m The height of the points A and B from
the ground are given in the figure. What is the
change in the gravitational potential energy of
the crate? A. 590J B. -590] C. 950] D. -950 J](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd55fa5b3-57ad-4613-8c02-d4b3a23ab6e0%2F3ca43ace-b5ab-406d-bcd4-0770ba96a6cd%2F1jvxk26_processed.jpeg&w=3840&q=75)
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- 7.)1. A 50 kg sled is pushed by applying a force F = 400 N, as shown, with = 30°. The surface is rough with 4 =.4. If the sled is being displaced a distance of 60 m, find the work done on the sled by: a. An applied force F. b. The dissipative force. c. The normal force. d. The weight. F. e. The net force.15. A 12 kg crate is pushed up an incline from point A to point B as shown in the figure: B 7.5 m 2.5 m The height of the points A and B from the ground are given in the figure. What is the change in the gravitational potential energy of the crate? A. 590J В. -590] С. 950] D. -950 J
- 7. A person pushes a box up an incline with constant force, and after calculating how much work they did on the box summed with how much work gravity did on the box they find a non-zero positive result, i.e. ?person>Wgravity. What are two explanations of where the “extra” work done by the person on the box went?P Flag question In the figure shown, if the mass (m36 Kg) is moving with constant speed and traveled a distance d-14 m on a rough horizontal surface, what is the work done in Joules by the frictional force? Given that F =15 N that makes 53 ° with the horizontal. A. -505.5 В. 250 C. -379.1 D. -126.4 E. -252.8 IIFind the work done in joules by gravity as an object of the mass m-8 kg is raised up at constant speed from a height h,=33 m to a height h2363 m. A.-7200 B. -4800 C.-1200 D. -2400 E. None hp SHOT ON POCO X3 NFC
- An accelerating object of mass m=12 kg is fired with an initial speed V;=5 m/s at a starting point. If its kinetic energy at its final destination is K.E=193 J. What is the resultant work (in joules) done on the object? A. 1043 B. None C. 843 D. 43 E. 543II. Instruction:Solve the following problems. Present in writing the full details of your answer or solutions. 1. What is the change in gravitational potential energy for a 70 kg man walking up stairs from a height of 64 m to 108 m? a. - 30215 J b. 30215 J 2. A 1500 kg car accelerates from o to 25 m/s in 8 s. What is the average power delivered by the engine (1 hp = 746 watts)? a. 68.5 hp b. 88.5 hp 3. A hammerhead of mass m = 4 kg is allowed to fall onto a nail from a height h = 0. 5 m. determine the maximum amount of work it could c. -30130 J d. 30130J с. 78.5 hp d. 98.5 hp do on the nail. a. 19.62 J b. 18.62 J с. 17.62 J d. 16.62 JIn the figure shown, if the mass (m=4 Kg) is moving with constant speed and traveled a distance d317 m, what is the work done in Joules by frictional force? Given that F =15 N and e =53 °. A. None B. -306.9 C. -153.5 D. -460,4 E. -613.8
- 5. A 3-kg ball is projected upward with an initial velocity that makes an angle 850 with the horizontal. The ball follows the path indicated and lands on a shelf 2-m high. How much work did the gravitational force do on the ball? V intal 2m15. A 12 kg crate is pushedup an incline from point A to point B as shown in the figure: -7.5 m 2.5 m The height of the points A and B from the ground are given in the figure. What is the change in the gravitational potential energy of the crate? А. 590] В. -590] С. 950] D. -950JFind the work done in joules by gravity as an object of the mass m=15 kg is raised up at constant speed from a height h1=35 m to a height h2-69 m. Consider g = 10 m/s² A. -15300 B. None C. -5100 D. -2550 E. -10200 O < O o OUOD