A31-kg girl climbs a 15-m rope in 29 s. Part A What is her average power? Express your answer with the appropriate units.
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- Part A A ski tow operates on a slope of angle 15.8° of length 260 m. The rope moves at a speed of 11.3 km/h and provides power for 47 riders at one time, with an average mass per rider of 75.0 kg. Estimate the power required to operate the tow. Express your answer in watts. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of A "power climb". A) ? b |X| х-101 P = W Submit Previous Answers Request AnswerThree objects with masses m, = 6.6 kg, m, = 14 kg, and m3 = 16 kg, respectively, are attached by strings over frictionless pulleys as indicated in the fiqure below. The horizontal surface exerts a force of friction of 30 N on m,. If the system is released from rest, use energy concepts to find the speed of m, after it moves down 4.0 m. m/s m2 m1help
- A 3.50 kg block is pulled up a frictionless inclined plane by a 60.0 N force that is parallel to the plane, starting from rest.The normal force on the block from the plane has magnitude 15.2 N.What is the block's speed when its displacement up the ramp is 3.40 m? Number i UnitsQuestion 2 D F, (N) + x (m) 0.10 0.05 The graph above shows a conservative force Fx as a function of position x acting on an object in a closed system. If this is the only force acting on the object, what happens to the potential energy of the system as the object moves from 0 m to 0.10 m? A It increases only. It decreases only. It increases and then decreases. It decreases and then increases. E It does not change.To stretch an ideal spring 8.00 cm from its unstretched length, 17.0 J of work must be done. Part A What is the force constant of this spring? Express your answer with the appropriate units. HA ? k Value Units %3D Submit Request Answer Part B What magnitude force is needed to stretch the spring 8.00 cm from its unstretched length? Express your answer with the appropriate units. HÀ ? F = Value Units Submit Request Answer
- A 02 UBC Engineering A trapeze artist of a mass of M to 01 trick. If the ropes do NO work on the artist, what is the speed just before they let go? What is their normal acceleration? 79kg is attempting a new trick on a rope of l 70° and then rope A is cut. The artist holds on until when 02 = 15° then lets go for the next 15m. They are lifted Neglect size and air resistancePart A The cable of a crane is lifting a 950 kg girder. The girder increases its speed from 0.25 m/s to 0.75 m/s in a distance of 2.3 m. What is the girder's change in kinetic energy? Express your answer with the appropriate units. AK = Value Units %3D Submit Request AnswerA 2.11 kg cart moving along a horizontal track in the positive x direction has a changing force exerted on it. The force exerted on the cart is plotted in the graph shown. In the plot, Fmax has a value of 5.95 Newtons. Note that the friction between the cart and track is negligible. a.-Calculate the work done on the cart when it has reached a displacement of 21.3 cm along the track. b.- If the cart starts from rest, calculate how fast the cart is going when it has reached a displacement of 21.3 cm along the track.
- Power of the Human Heart. The human heart is a powerful and extremely reliable pump. Each day it takes in and discharges about 7500 L of blood. Assume that the work done by the heart is equal to the work required to lift this amount of blood a height equal to 1.5 m. The density (mass per unit volume) of blood is 1050 kg/m3 . What is the heart's power output. Use g = 9.8m/s2 Calculate answer to one decimal.A 4.00kg block moves with an initial speed of3.50 km/h downhillover an inclined plane as shown in the figure. The height of the inclined plane is 51.3cm and the friction coefficient between the block and the incline is 0.120. a.How much is the speed of the block at the midpoint of the inclined side. b.How much is the speed of the block at the bottom of the inclined side.▼ Part A How much work must you do to push a 10.0 kg block of steel across a steel table (uk = 0.60) at a steady speed of 1.20 m/s for 5.20 s? Express your answer with the appropriate units. View Available Hint(s) Wp push = Submit Part B P = Submit Value What is your power output while doing so? Express your answer with the appropriate units. ► View Available Hint(s) HÅ μÅ Value Units Units ? ?