Homework Answers
(A) is correct option
reason: work done by force is (force)*(displacement in direction of force) here block is moving along floor i.e in horizontal direction.There is no vertical displacement in direction of gravity hence gravity does no work on block
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A boy is pulling a box to the right for a certain distance across a rough...
a sled is pulled across a rough level floor at increasing speed. Which statement is true...
a sled is pulled across a rough level floor at increasing speed. Which statement is true about the forces acting on the sled? a: the normal force is doing positive work b: the kinetic friction is doing negative work c: the weight of the cart is doing positive work d: the pulling force is doing negative work? Thank you so much!
You need to push a heavy box across a rough floor, and you want to minimize...
You need to push a heavy box across a rough floor, and you want to minimize the average force applied to the box during the time the box is being pushed. Which method for pushing results in the minimum average force being applied to the box? Keep pushing the box forward at a steady speed, Push the box forward a short distance, rest, then repeat until finished, Push the box so that it accelerates forward at a constant rate. This...
ron and judy each pull a 40 kg crate across a rough floor at constant speed...
ron and judy each pull a 40 kg crate across a rough floor at constant speed for a distance of 2.0 m. ron pulls horizontally and judy pulls at an angle of 30 degrees above horizontal. the coefficient friction between each crate and the floor is 0.50. a.) calculate the work done by ron b.) calculate the work done by judy c.) is the work ron does on his crate, more, less, or the same as the work judy does...
Starting from rest, a student pulls a (25.0+A) kg box a distance of (4.50 + B)...
Starting from rest, a student pulls a (25.0+A) kg box a distance of (4.50 + B) m across the floor using a (134 + C) N force applied at 35.0 degrees above horizontal. The coefficient of kinetic friction is 0.220 between the floor and the box. Find the work done by the pulling force. Give your answer in joules (J) and with 3 significant figures. A=1 B=3 C=11
a) A box in an upward moving elevator is being pushed across the floor with a...
a) A box in an upward moving elevator is being pushed across the floor with a constant force. 1) Friction is doing positive work on the box. True or False 2) The pushing force is doing negative work on the box. True or False 3) The normal force on the box is doing positive work on the box. True or False 4) If there is net positive work on the box parallel to the floor, the kinetic energy of the...
As shown in the figure below, a box of mass m = 51.0 kg (initially at...
As shown in the figure below, a box of mass m = 51.0 kg
(initially at rest) is pushed a distance d = 98.0 m across a rough
warehouse floor by an applied force of FA = 200 N directed at an
angle of 30.0° below the horizontal. The coefficient of kinetic
friction between the floor and the box is 0.100. Determine the
following. (For parts (a) through (d), give your answer to the
nearest multiple of 10.)
(a) work...
answer d, e, f please As shown in the figure below, a box of mass m...
answer d, e, f please
As shown in the figure below, a box of mass m = 60.0 kg (initially at rest) is pushed a distance d = 53.0 m across a rough warehouse floor by an applied force of FA - 248 N directed at an angle of 30.0° below the horizontal. The coefficient of kinetic friction between the floor and the box is 0.100. Determine the following. (For parts (a) through (d), give your answer to the nearest...
You are a fitness trainer developing an exercise that involves pulling a heavy crate across a...
You are a fitness trainer developing an exercise that involves pulling a heavy crate across a rough surface. You attach a rope to a crate of mass M = 45.0 kg and place it on a carpeted track. Using your physics expertise, you have already determined that the coefficient of kinetic friction between the crate and the carpet is μk = 0.430. To test the apparatus, you have one of your employees pull on the rope as hard as she...
A box of mass ? is pushed a distance Δ? across a level floor by a...
A box of mass ? is pushed a distance Δ? across a level floor by a constant applied force ?. The coefficient of kinetic friction between the box and the floor is ?. Assuming the box starts from rest, express the final velocity ?f of the box in terms of ?, Δ?, ?, ?, and ?. A box labeled M sits on the left side of a table. An arrow touching the left side of the box representing the applied...
A) A massless rope is tied to a 1.82 kg box sitting on a rough, horizontal...
A) A massless rope is tied to a 1.82 kg box sitting on a rough, horizontal surface. The rope is pulled with constant force F acting upward at an angle 15.8o to the horizontal. The coefficient of kinetic friction between the box and the surface is 0.217, and the box slides at constant speed along the table for a distance of 84.4 m. Find the total work done by F, in J. B)Josh, mass 143 kg, is racing against his...
You need to push a heavy box across a rough floor, and you want to minimize the average force applied to the box during the time the box is being pushed. Which method for pushing results in the minimum average force being applied to the box? Keep pushing the box forward at a steady speed, Push the box forward a short distance, rest, then repeat until finished, Push the box so that it accelerates forward at a constant rate. This...
As shown in the figure below, a box of mass m = 51.0 kg
(initially at rest) is pushed a distance d = 98.0 m across a rough
warehouse floor by an applied force of FA = 200 N directed at an
angle of 30.0° below the horizontal. The coefficient of kinetic
friction between the floor and the box is 0.100. Determine the
following. (For parts (a) through (d), give your answer to the
nearest multiple of 10.)
(a) work...
answer d, e, f please
As shown in the figure below, a box of mass m = 60.0 kg (initially at rest) is pushed a distance d = 53.0 m across a rough warehouse floor by an applied force of FA - 248 N directed at an angle of 30.0° below the horizontal. The coefficient of kinetic friction between the floor and the box is 0.100. Determine the following. (For parts (a) through (d), give your answer to the nearest...
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