2. A'workman carries some lumber up a staircase. The workman moves 9.6 m vertically and 22 m horizontally. If the lumber weighs 45 N, how much work was done by the workman? Edit View Insert Format Tools Table 12pt v Paragraph v |BIU U Av ev T?v

2. A'workman carries some lumber up a staircase. The workman moves 9.6 m vertically and 22 m horizontally. If the lumber weighs 45 N, how much work was done by the workman? Edit View Insert Format Tools Table 12pt v Paragraph v |BIU U Av ev T?v

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Humans can produce an output power as great as 20 W/kgW/kg during extreme exercise. Sloths are not so energetic. At its maximum speed, a 4.0 kgkg sloth can climb a height of 6.0 mm in 2.0 minmin. (Figure 1) a. How much work does the sloth do against gravity to climb 6.0 mm? b.What is the sloth’s specific power output during this climb? Express your answer in watts per kilogram.
4. A block is launched up a frictionless ramp, as shown, with initial speed v,. The block travels up the ramp and continues across the level section. H a. List the forces exerted on the block after it has been launched, as it moves up the ramp. Which forces, if any, do non-zero work on the block? Which forces, if any, do zero work on the block? b. Write an expression for the net work done on the block from the bottom to the top of the ramp. Express your answer in terms of one or more of the following quantities: the weight mg of the block, the angle 0, and the height H of the ramp. Show your work.
a) The acceleration of a 5.0 kg box is 2.5 ms?. when a horizontal force is applied across a surface having a coefficient of friction of 0.5, as shown in Figure 3. a = 2.5 ms-2 7 kg Hk = 0.5 Figure 3 Find the work done over a distance of 25 cm by ix. the horizontal force the frictional force, and Х. xi. the net force. xi. what is the change in kinetic energy of the box?
7. A 1650 kg car accelerates up a hill by applying a force of 4.61 × 10³ N parallel to the hill. The hill is at an incline of 13°. m 2016 d = 17 m 13° A. What is the net work done on the car as it travels 17 m up the hill? (Hint: calculate the work done by each force in the system. There are 3 forces. The net work is the sum of the works done by each individual force.) b. What is the change in kinetic energy for the car? at the bottom of the hill. How fast is it moving at the top The car is travelling at a speed of 16 of the hill? I= c) 74°F
A man pulls a 100 N box using a rope oriented at an angle of 30˚ with the horizontal force on a rough floor that exerts 8N frictional force on the box. Suppose the box has moved a distance of 10m to the right. Find the work done by each force acting on the box. What is the net work done on the box? a. 786 J b. 870 J c. 946 J d. 1080 J
A child pulls a wagon 5.0 m using a force of 25 N at an angle 15 degrees above horizontal. The force of friction on the wagon is 8.1 N. Calculate the work done on the wagon in the horizontal direction. a. 6.5 J b. 24.1 J c. 32.5 J d. 80 J e. 84.5 J f. 125.1 J g. 125 J h. don't be silly, you can't calculate the net work without the change in KE!!
1.3 A dog pulls a cart with a constant force of 50N. How much work is done by the dog to move the 200 m cart if the handle forms an angle of 20° with the ground?
On a horizontal surface with µk = 0.70, a 5kg object is dragged with 350N force directed due East. a. Draw all forces, and calculate the work done by each force if the object moves from 3 m to 10 m on the x-axis. Calculate the total work.
In the Figure below, we see a 500 gram block resting on the horizontal portion of a "track", whose left end is curved upwards. The horizontal portion of the track is frictionless, except for a 50.0 cm long “rough" portion, shown in the Figure, where the coefficient of kinetic friction is 0.300. The curved portion of the track is frictionless. The block is held against a spring (which has a stiffness constant of 500 N/m), compressing the spring by 10.0 cm. Then the block is released from rest. (NOTE: The block is not attached to the spring; it is just held against the end of the spring.) For simplicity, assume that g = 9.80 m/2. 50.0 cm
A 123.0 N carton is pulled up a frictionless baggage ramp inclined at 29.0 degrees above the horizontal by a rope exerting a 70.0 N pull parallel to the ramp's surface. The carton travels 5.00 m along the surface of the ramp. Part A: Calculate the work done on the carton by the rope. Part B: Calculate the work done on the carton by the gravity. Part C: Calculate the work done on the carton by the normal force of the ramp. Part D: What is the net work done on the carton? Part E: Suppose that the rope is angled at 48.4 degrees above the horizontal, instead of being parallel to the ramp's surface. How much work does the rope do on the carton in this case?
5. A 2kg box slides down a ramp two meters before it reaches the ground. The ramp has an angle of 30o. What is the work done by gravity on the box? a. 20 J b. 4.24 J c. 13 J d. 52 J
1.1 A sled is dragged 8.0 m along a horizontal path at a constant speed of 0.30 m/s by a rope that is inclined at an angle of 25° above the horizontal. The tension in the rope is 450 N. What was the magnitude of the work done by the rope on the sled?