How much work (in J) is done by the boy pulling his sister 29 m in a wagon as shown in the figure below? F 30° A boy pulling a wagon with a child sitting in the cart along a horizontal surface. The boy is shown pulling the handle of the wagon at an angle of 30° above the horizontal. Along the length of the handle, a diagonal arrow labeled Fextends from the wagon to the boy. A horizontal arrow labeled d extends from the wagon to the boy. Assume no friction acts on the wagon. (Assume d = 29 m and F= 55 N. Enter a number.) W =

How much work (in J) is done by the boy pulling his sister 29 m in a wagon as shown in the figure below? F 30° A boy pulling a wagon with a child sitting in the cart along a horizontal surface. The boy is shown pulling the handle of the wagon at an angle of 30° above the horizontal. Along the length of the handle, a diagonal arrow labeled Fextends from the wagon to the boy. A horizontal arrow labeled d extends from the wagon to the boy. Assume no friction acts on the wagon. (Assume d = 29 m and F= 55 N. Enter a number.) W =

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Description: How much work (in J) is done by the boy pulling his sister 29 m in a wagon as shown in the figure below?F30°A boy pulling a wagon with a child sitting in the cart along a horizontalsurface. The boy is shown pulling the handle of the wagon at an angl

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 43P: A particle moves along a curved path y(x)=(10m){1+cos[0.1m1]x} , from x=0 to x=10m , subject to a...

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A particle moves along a curved path y(x)=(10m){1+cos[0.1m1]x} , from x=0 to x=10m , subject to a tangential force of variable magnitude F(x)=(10N)sin[(0.1m-1)x] . How much work does the force do? (Hint: Consult a table of integrals or use a numerical integration program.)
(a) For what values of the angle between two vectors is their scalar product positive? (b) For what values of is their scalar product negative?
If the child climbs too high, then the ladder will slide along the ground. c. In this situation, is work done by the friction force? d. Is work done by any force acting when a ball rolls along a horizontal surface?
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A child sits on the shoulder of his father.(a). Is work done on the sitting child by his father? Explain.(b). Explain why the father feels tired carrying his child on his shoulder.
A man cleaning a frictionless floor pulls a vacuum cleaner with a force F of magnitude 50 N at an angle of 30° withthe horizontal. a. Draw a labelled free body diagram showing all the forces that act on the vacuum cleaner.b. What is the magnitude of the work done by the weight of the vacuum cleaner? Explain briefly.c. Calculate the work done by the force F on the vacuum cleaner as the vacuum cleaner isdisplaced 3 m to the right.
A 72 g g particle is moving to the left at 28 m/s m / s . How much net work must be done on the particle to cause it to move to the right at 38 m/s m / s ? Express your answer to two significant figures and include the appropriate units.
A 2.75-meter-long log on a panda sanctuary leans on an almost vertical rock wall and it makes 30⁰ angle with the vertical rock wall. If a 75 kg panda climbs the log, a) compute the work done by gravity on the panda. b) Does the answer to part (a) depend on whether the panda climbs at constant speed or accelerates up the log?
The last word of the sentence in the picture is "particle" a. Find the work done by the force using a dot product. b. Find the angle between the force and displacement.
Matthew pushes a box of toys along a 5 m long ramp that is inclined 3 m high as shown in the figure below. The box has a total mass of 20 kg and the coefficient friction between the box and the ramp is 0.33. (a) How much force is needed by Matthew to move the box uniformly along the inclined ramp? (b) How much work is done by the force the box has travelled the 5.0 m length incline? (c) How much work is done by friction? (d) How much work is done by gravity? (e) How much work is done by the normal force? (f) What is the total work done by all the forces on the box?
ASAPPP, answer the two questions then I will like. What is the dot product of the two vectors: A = 2i +3j -4k B = 7i – 2j + k
A 75.0 kg painter climbs a ladder that is 2.75 m long and leans against a vertical wall. The ladder makes a 30.0° angle with the wall. (a) How much work does gravity do on the painter? (b) Does the answer to part (a) depend on whether the painter climbs at constant speed or accelerates up the ladder?