pulls the sled over a distance of 49.8 m. CTT How much work is done by the snowmobile? 118719.66 J (b) If the sled is also being acted on by a constant kinetic friction force of 240 N and it started from rest, what is the final speed of the sled? 2848.55 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s

pulls the sled over a distance of 49.8 m. CTT How much work is done by the snowmobile? 118719.66 J (b) If the sled is also being acted on by a constant kinetic friction force of 240 N and it started from rest, what is the final speed of the sled? 2848.55 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s

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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9. A man pushes an 80-N crate up a frictionless slope that makes an angle of 30° with the horizontal. The man was able to push it to a distance of 5.0Om along the slope with a force parallel also to the slope. However the speed of the crate decreases at a rate of 1.5 m/s?. The work being done by the man is: A. -200 J В. 61J С. 140 J D. 200 J 14. A 6.0-kg block is released from rest 80 m above the ground. When it has fallen 60 m its kinetic energy is approximately: A. 4800 J В. 3500J C. 1200 J D. 120 J
39 A 1.00 kg block slides down a 20.0 meter ramp at a constant velocity. The angle of inclination of the ramp is 30°. How much work is done by friction? Ans. 98.0 J 45. A car pulls a trailer with a force of 2000 N at 20.0 m/s. What is the Ans. 4.00 x 104 Watts power exerted?
A van travels on a rough level road with an initial speed vo. The road has a coefficient of kinetic friction Hk. At the instant when the brakes lock, the tires slide than roll. 1. List down the forces that do work on the car. 2. Use the work-kinetic energy theorem to determine the minimum stopping distance of the car in terms of its initial velocity vo, the acceleration due to gravity g and the coefficient uk. 3. Using one of the kinematic equations, determine the time it takes for the car to stop in terms of the initial velocity vo. 4. Use your previous result to determine the power it takes for the car to stop completely.
A. How much work is done by w⃗ ? Express your answer using three significant figures. W = 1.00×104 J B. How much work is done by T⃗ 1? Express your answer using three significant figures. W = -6340 J C. The two ropes seen in (Figure 1) are used to lower a 255 kg piano exactly 4 m from a second-story window to the ground. Express your answer using three significant figures.
The overworked Amazon delivery person is driving up a steep hill with an incline of 26° when a box they forgot to secure starts sliding toward the back of the truck. The 3.5 kg box starts from rest near the drivers seat and slides 2.1 m along the floor to the rear door. The coefficient of kinetic friction between the box and the floor is 0.36. What is the work done by the weight of the box? Wmg 31.6 J What is the work done by the Normal Force? WN = 0 What is the work done by the frictional force? Wfk = 23.31 What is the net work done on the box? Wnet What is the change in kinetic energy for the box? AKE How fast is the box moving just before it hits the rear door? Vfinal = J J X J J ms
A) A 1390 kg car accelerates uniformly from rest to 10.4 m/s in 2.87 s. Find the work done on the car in this time interval. Answer in units of kJ. B) Find the average power delivered by the en- gine in this time interval. Answer in units of hp. C) Find the instantaneous power delivered by the engine at t = 1.5 s. Answer in units of hp.
11. How much work does Amanda's car experience compared to Bertha's? Amanda and Bertha are in a car race. Their cars have the same mass. At one point in the race, they both change their speeds by 10 m/s in 2 seconds. Ignore air friction. 2s later 2s later 10 m/s 20 m/s 20 m/s 30 m/s Amanda Bertha a. Amanda's car experiences less work b. Amanda's and Bertha's car experience the same amount of work c. Amanda's car experiences more work. O d. Only Rihanna would know. (Work Work Work Work Work...) 96 alt
A cheerleader lifts his 68 kg partner straight up off the ground a distance of 0.72 m before releasing her. Assume the partner’s velocity is zero at the beginning and the end of the lift. The acceleration of gravity is 9.8 m/s2 . If he does this 22 times, how much work has he done? Answer in units of J.
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A force F = (3.0N)î + cj acts on a particle as the particle goes through displacement d = (3.0m)i – (2.0m)j. (Other forces also act on the particle.) What is c in Newtons if the work done on the particle by force is 17 J? wwww m Lütfen birini seçin: O A. -6 O B. -11 O C.-12 O D. -4 O E. -8
a) The acceleration of a 5.0 kg box is 2.5 ms?. when a horizontal force is applied across a surface having a coefficient of friction of 0.5, as shown in Figure 3. a = 2.5 ms-2 7 kg Hk = 0.5 Figure 3 Find the work done over a distance of 25 cm by ix. the horizontal force the frictional force, and Х. xi. the net force. xi. what is the change in kinetic energy of the box?
1. A box of mass m,, initially at rest, is acted on by a single position and time-dependent force y F(x) = Fo sin(b?t) £ + Fo e Viŷ with b, Fo, y, constants. a. Determine the units of the constant b, F., and y1. b. Assuming your system is the book, find the work done by this force on the book as it moves from 7 = õ to i; = xf& + Y1ŷ.