A particle moves from (0,0) to (3,4) while experiencing a force F = 6i + 8j. How much work does the force do if the particle follows the path (0,0) -> (3,0) -> (3,4)? %3D Distances and forces are given in meters and newtons respectively. 50 J 48 J 14 J -50 J - 48 J
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- 2. A force acting on an object moving along the x axis is given by Fx=(14x- 3.0x) N where x is in m. How much work is done by this force as the object moves from x =-1m to x +2 m? %3DA 6.50 kg box slides 4) from the top of a ramp to the bottom at a constant speed, as shown in the diagram. constant v= 1.50 m/s h= 1.85 m 0= 28.2° a) How much work is done on the box by the frictional force? b) How much work is done on the box by gravity? c) How much work is done on the box by the normal force? d) What is the coefficient of kinetic friction between the box and the ramp?% Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. 5 The work you do is 4 J. 15 True O False O Bi 89 6 X 7 18 ASUS 8 A 19 9 f10 fll f12 pau bre
- 7. A student in a lab exerts a 25 N force to pull a block a distance of 48 cm. If a total of 11 J of work is done, the angle between the force and the displacement is a. 89° b. 66° d. 24° e. none of the above c. 61° 8. A 102-g sparrow flying at 12.3 m/s wishes to have equal kinetic and gravitational potential energies. The height that will accomplish this is a. 0.315 m b. 0.628 m d. 1.13 m e. 7.72 m c. 0.787 m 9. Earth's mass is 5.98 x 1024 kg. Calculate the value of g at a point 4.8 x 105 km from the centre of Earth. a. 9.8 × 102 N/kg b. 8.3 x 10' N/kg C. 1.7 × 103 N/kg d. 1.7 x 10³ N/kg e. 9.8 × 105 N/kg 10. A piece of paper becomes electrically charged when a charged rod of plastic is placed close to it. This is referred to as a. charging by a conductor b. charging by induction c. charging by an insulator A P d. charging by contact e. charging by electricity 20 cm Ꭰ T 20 cm 11. Four charged spheres, A, D, P, and T are arranged as shown below. Sphere A has a charge of +4.5 × 10*C,…A 11 g particle is moving to the left at 17 m/s. How much net work must be done on the particle to cause it to move to the right at 45 m/s ? Express your answer to two significant figures and include the appropriate units. µA ? W = Value Units Submit Request Answer Provide Feedback Next >A spaceship is launched vertically upward. The total work done on the spaceship is: A: positive B: negative C: cannot be determined with the information given D: negative at the beginning, and then zero as the space shuttle moves upward
- The only force acting on a 2.0 kg canister that is moving in an xy plane has a magnitude of 5.7 N. The canister initially has a velocity of 4.5 m/s in the positive x direction, and some time later has a velocity of 4.8 m/s in the positive y direction. How much work is done on the canister by the 5.7 N force during this time? Number i Units10. Show your complete solutionAn object with a mass of 15kg slides down an incline with a length of 6.0m at an angle of 28 degrees from horizontal. The coefficient of friction between the object and incline is 0.25 a) How much work does the gravitational force perform on the object? b) How much work does the frictional force perform on the object? c) What will its speed be as it reaches the bottom of the incline?
- A force F = -12 NÎ+ 10 N s acts on an object. How much work does this force do as the object moves from the origin to the point = 13 mî+11 mĵ? 266 J O -46 J 46 J -266 J 62 JA floating ice block is pushed through a displacement d = (27.0 m )î – ( 24.0 m j along a straight embankment by rushing water, which exerts a force F = (298 N )î - (183 N c on the block. How much work does the force do on the block during the | displacement? Number i Units