My sister Sara is pulling a box along a horizontal surface with the force F inclined at an angle 0 with the horizontal. The box moves a distance d. F I say that the work done by the force of gravity is equal to zero. O True O False
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A: Given : F = 5 N d = 2 m
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- A force of 12 Ib is required to hold a spring stretched 2 in. beyond its natural length. How much work W is done in stretching it from its natural length to 6 in. beyond its natural length?I lower a block to the floor at constant speed. I do work on the block and gravity does work on the block.In which of these situations is WORK being done?
- Can positive work and negative work be done on an object at the same time? O Yes, a hockey puck sliding to a stop is a good example. No Yes, a satellite in a circular orbit is a good example. Yes, a car driving along a street at constant speed is a good example.% 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 breCan the normal force on an object ever do work? Explain.
- answer should be fractionAt point B, a 240.0 kg roller coaster car is moving at 22 m/s. Assuming there is friction from points D to E, calculate the work done to bring the roller coaster to rest at point E. yo 30 m Ve da 20 m yo" Dm O-1.1 x 10^5 J O-4.7x10^4 J O-5.8 x 10^4 J O1.4 x 10^7 J -6.8 x 10^5 Jplease help me with this
- A horizontal force, acts on an 8N box. The box moves 12 m horizontally at a constant speed. The coefficient of kinetic friction is 0.25. Determine the work done by the horizontal force.d amolg 2. A 100 Newton force is applied to a 15kg box in the horizontal direction and moves it : meters horizontally. How much work was done? ps ow DI Amaapaid DI 3. There is a 2kg book lying on a table. A 64 N force is applied to the book at a 120° angle from horizontal and moves the book 3 meters in the horizontal direction. How much work was done?DP-1 A 7.50kg box is pushed 1.70m along a frictionless horizontal table top by a constant force directed below as shown to the right. The work done by P is 25.0J. Find the angle 8 between the force P and the horizontal. P=20.0N Table top Ax 1.70m1 7.50kg