A man pulls a 100-N crate up a frictionless 30° slope 5- m high, as shown. Assuming that the crate moves at constant speed, the work done by the man is: 100 N 5 m 30° 77
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- An airplane flies 140 km at a constant altitude in a direction north of east. A wind is blowing that results in a net horizontal force on the plane due to the air of 2.40 kN in a direction 10.0° south of west. How much work is done by the air on the plane? Group of answer choices: A) -1.15 × 108 J B) -3.15 × 108 J C) 0.985 × 108 J D) -257 × 108 J E) 257 × 108 JA 1.9 kg book is lying on a 0.75mm high table. You pick it up and place it on a bookshelf 2.1 mm above the floor. During this process, how much work does gravity do on the book? During this process, how much work does your hand do on the book? Express your answer with the appropriate units.A car with the mass m=1600kg coasts down an incline from an initial height of h=7m with an initial speed v0=15m/s. When it reaches the bottom of the incline its speed is 20m/s. How much work did friction do on the car? This is the full question. No acceleration given. Assistance please.
- During terrible weather at a ski-flying world championship, a ski jumper tried to adjust for bad conditions midway down the ramp but completely lost control and tumbled wildly off the side at its bottom into a scattering crowd. The 73-kg jumper left the ramp about 45 m lower than his starting position. After hitting the ground, the jumper crashed wildly and descended down the hill another 20 vertical meters before coming to rest. Here, friction cannot be ignored. Calculate the total work done on the ski jumper to bring him to rest. Round the final answer to the nearest whole number.A particle is subject to a force F, that varies with position as shown in the following figure. F, (N) 3 1 x (m) 2 4 6 8 10 12 14 16' (a) Find the work done by the force on the particle as it moves from x = 0 to x = 2.00 m. (b) Find the work done by the force on the particle as it moves from x = 5.00 m to x = 7.00 m. (c) Find the work done by the force on the particle as it moves from x = 10.0 m to x = 15.0 m. (d) What is the total work done by the force over the distance x = 0 to x = 15.0 m?A nonconstant force is exerted on a particle as it moves in the positive direction along the x axis. The figure below shows a graph of this force F, versus the particle's position x. Find the work done by this force on the particle as the particle moves as follows. Fx (N) 12.0 X (m) 4.0 8.0 12.0 16.0 -12.0 (a) From x; = 0 to x = 8.0 m 44 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. J (b) From X; = 8.0 to Xf = = 16.0 m |-60 Your response differs from the correct answer by more than 100%. J (c) From x; = 0 to x = 16.0m |-30 The response you submitted has the wrong sign. J
- Fig2 Fig I M2 fig 3 K 30° Fr4 4A dog (of mass 50 kg) is happily sliding down a hill that has a coefficient of kinetic friction of 0.2. The hill has a slope of 20 degrees. Assuming that the dog is letting gravity do all the work, what is the magnitude of the dog's acceleration down the slope? 0.51 O 3.51 O 2.51 1.51 600A force with a magnitude of 60 N is applied at an angle theta= 50 to the horizontal to an object initially at rest, displacing it 5 m from its initial location. The object weighs 50 kilograms and there is no friction. After this displacement, the force is no longer applied. Determine the work being done by the force? How fast is the object when the force is removed? When the force is no longer exerted, the item falls down a 10-meter-high cliff. When it reaches the ground, what is its velocity? When it strikes the ground, it slides along the ground, which has a coefficient of kinetic friction of 0.25. How far does it go before coming to a stop?