1.)

Part A Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.40x10* N . one at an angle 12.0" west of north, and the other at an What is the total work done by the two tugboats on the supertanker? angle 12.0 east of north, as they pull the tanker a Express your answer in joules, to three significant figures. distance 0.640 kin toward the north. * View Available Hint(s) O a ? VX VX IX1 X - 107 ,J Submit Previous Answers X Incorrect; Try Again; 9 attempts remaining Check the definition of the scalar product of two vectors. You may need to review The Vector Scalar Product.Part A A boxed 14.0 kg computer monitor is dragged by friction 5.50 m up along the moving surface of a conveyor belt inclined at an angle of 35.0" above How much work is done on the monitor by friction? the horizontal. The monitor's speed is a constant Express your answer in joules. 3.00 cin/S. W friction Submit Request Answer Part B How much work is done on the monitor by gravity? Express your answer in joules. AId W gravity Submit Request Answer Part C How much work is done on the monitor by the normal force of the conveyor belt? Express your answer in joules. AEd + OF ? WN Submit Request AnswerPart A About 50,000 years ago, a meteor crashed into the earth near present-day Flagstaff, Arizona. Measurements from 2005 estimate that this meteor How much kinetic energy did this meteor deliver to the ground? had a mass of about 1.4 x 10* kg (around Express your answer with the appropriate units. 150,000 tons) and hit the ground at a speed of 12 km/s. HA For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Using work and energy to calculate speed K = Value Units Submit Request Answer Part B How does this energy compare to the energy released by a 1.0 megaton nuclear bomb? (A megaton bomb releases the same energy as a million tons of TNT, and 1.0 ton of TNT release 4.184 x 10" J of energy.) Express your answer using two significant figures. AEh * O IE ? Emeteor Ebomb Submit Request AnswerPartA Use the work-energy theorem to solve each of these problems. You can use Newton's laws to check your answers. A skier moving at 5.80 In/S encounters a long, rough, horizontal patch of snow having a coefficient of kinetic friction of 0.220 with her skis. How far does she travel on this patch before stopping? Express your answer with the appropriate units. HA # OF ? Value Units Submit Request Answer Part B Suppose the rough patch in part A was only 2.91 m long. How fast would the skier be moving when she reached the end of the patch? Express your answer with the appropriate units. HA Value Units Submit Request Answer Part C At the base of a frictionless icy hill that rises at 25.0" above the horizontal, a toboggan has a speed of 12.5 m/$ toward the hill. How high vertically above the base will it go before stopping? Express your answer with the appropriate units. HA Value UnitsPart A Consider a spring, with spring constant It, one end of which is attached to a wall. (Figure 1)The spring is initially unstretched, with the unconstrained end of the spring at The spring is now compressed so that the unconstrained end moves from I = 0 to position I = 0. I = L. Using the work integral W = [: F(i) . di. find the work done by the spring as it is compressed. Express the work done by the spring in terms of k and L. View Available Hint(s) VO W = Submit Provide Feedback Next > Figure =LPart A To stretch an ideal spring 7.00 ci from its unstretched length, 17.0 J of work must be done. What is the force constant of this spring? Express your answer with the appropriate units. HA # OF= ? K = Value Units Submit Request Answer Part B What magnitude force is needed to stretch the spring 7.00 cm from its unstretched length? Express your answer with the appropriate units. HA F : Value Units Submit Request Answer Part C How much work must be done to compress this spring 4.00 cun from its unstretched length? Express your answer with the appropriate units. HA W = Value Units Submit Request AnswerPart D What force is needed to compress the spring this distance? Express your answer with the appropriate units. HA F = Value Units Submit Request AnswerPart A A force F is applied to a 2.0 kg, radio-controlled model car parallel to the I-axis as it moves along a straight track. The I-component of the force varies with the I-coordinate of Calculate the work done by the force F when the car moves from I = 0 to I = 3.0 m. the car as shown in the figure (Figure 1). Express your answer with the appropriate units. HA WO 10= Value Units Submit Request Answer Part B Calculate the work done by the force F when the car moves from I = 3.0 m to I = 4.0 m. Express your answer with the appropriate units. HA W20 40 = Value Units Submit Request Answer Part C Figure Calculate the work done by the force F when the car moves from I = 4.0 m to T = 7.0 m. FX (N) Express your answer with the appropriate units. HA J x (m) 12 3 4 5 7 Value Units Submit Request AnswerPart D Calculate the work done by the force IF" when the car moves from :1=0 to =7.0m. Express your answer with the appropriate units. W = Value Units Submit Request Answer Part E Calculate the work done by the force I'' when the car moves from :I = 7.0 III to T = 2.0 m. Express your answer with the appropriate units. HA Of ? W = Value Units Submit Request AnswerPart A A typical flying insect applies an average force equal to twice its weight during each downward stroke while hovering. Take the mass of the insect Assuming 100 downward strokes per second, estimate the average power output of the insect. to be 10 g, and assume the wings move an Express your answer in watts. average downward distance of 1.0 cin during each stroke. AEd For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of A "power climb". P = W Submit Request