1830 N 1295 N 60° 45° 2500 N W FIGURE P10.2
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Q: forces act, one of which is known to be constant in time: F1 = (5 N)î + (7 N)ĵ. As a result, the…
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Q: A dock worker pushes a m = 2.20 kg block a distance d = 3.60 m along the floor by a constant force…
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The two ropes seen in the image are used to lower a 255 kg piano exactly 5 m from a second-story window to the ground. How much work is done by each of the three forces?
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- A dock worker pushes a m = 3.20 kg block a distance d = 2.00 m along the floor by a constant force of magnitude F = 16.0 N directed at an angle 8 = 22.0° below the horizontal as shown in the figure. Assume the floor is frictionless. (Enter your answers in joules.) m (a) Determine the work done on the block by the applied force (the force on the block exerted by the dock worker). J (b) Determine the work done on the block by the normal force exerted by the floor. J (c) Determine the work done on the block by the gravitational force. J (d) Determine the work done by the net force on the ock. JA spring and block are in the arrangement of the figure. When the block is pulled out to x = +5.0 cm, we must apply a force of magnitude 370 N to hold it there. We pull the block to x = 14.0 cm and then release it. How much work does the spring do on the block when the block moves from x₁ = +5.0 cm to (a) x = +4.0 cm, (b) x = -4.0 cm, (c) x= -5.0 cm, and (d) x = -10.0 cm? (a) Number i (b) Number i (c) Number i (d) Number i x=0 F = 0 00000000 x positive F, negative F moon Units Units Units (a) Units (b) d Block attached to spring x negative F, positive x x xA girl with a 40 kg mass is riding an 8 kg bike. At the top of the hill her speed is 6 m/s and her speed triples at the bottom of the hill. The hill is 15 m high. What is the work done by the non conservative forces?
- A helicopter lifts a 85 kg astronaut 13 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10. How much work is done on the astronaut by (a) the force from the helicopter and (b) the gravitational force on her? Just before she reaches the helicopter, what are her (c) kinetic energy and (d) speed?A child on a sled is initially at rest on an icy horizontal surface. The sled is pushed until it reaches a final velocity of 6.05 m/s in a distance of 15.6 m. The coefficient of friction between the ice and runners of the sled is 0.200, and the weight of the child and the sled is 375 N. Find the work done by the force pushing the sled.A helicopter lifts a 65 kg astronaut 18 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10. (a) How much work is done on the astronaut by the force from the helicopter? (b) How much work is done on the astronaut by her weight? (c) What is the kinetic energy? (d) What is the speed of the astronaut just before she reaches the helicopter? m/s
- The graph (attached) shows the x component of a force that acts on an object that moves on the x axis. The vertical spacing between adjacent grid lines is 2.75 N, while the horizontal spacing between adjacent grid lines is 1.0 m. What is the work done by the force, in joules, as the object moves from x=1m to x=8m?A 10 kg barbell is rolling down a hill. There is no friction or air resistance acting on it, only the force of gravity. If it starts out moving 2 ms1, and ends up moving 7 ms1, then how much work does gravity do on it?A boy is pulling his sister in a wagon, as shown in the figure. He exerts a force of F = 50.5 N at an angle of 30°.How much work does the boy do pulling his sister, in joules, if he pulls her 27.5 m?
- A 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.The force F(x) varies with position, as shown below. Find the work done by this force on a particle as it moves from x = 1.0 m to x = 5.0 m. F(x) (N) 4 6.0 4.0 2.0 0 -2.0 -4.0 2.0 4.0 6.0 8.0 x(m)A woman pushes a m = 2.40 kg carton a distance d = 5.80 m along the floor by a constant force of magnitude F = 16.0 N directed at an angle 8 = 21.0° below the horizontal as shown in the figure. Assume the floor is frictionless. (Enter your answers in joules.) Ⓡ (a) Determine the work done on the carton by the applied force (the force on the carton exerted by the woman). (b) Determine the work done on the carton by the normal force exerted by the floor. נן (c) Determine the work done on the carton by the gravitational force. (d) Determine the work done by the net force on the carton. נן