A stonemason is dragging a 60-kg marble block 4 m across a floor by pulling on...

A stonemason is dragging a 60-kg marble block 4 m across a floor by pulling on a rope attached to the block. He pulls with a horizontal force of 210 N. The coefficient of kinetic friction between the block and the floor is 0.30. The next five questions have to do with this scenario. Draw yourself a free-body diagram on the block.

How much work was done by the stonemason in dragging this block?

a.
100 J

b.
560 J

c.
840 J

d.
1230 J
Add up the y-components, ΣF_y, and determine the normal force the floor exerts upward on the block.

a.
588 N

b.
345 N

c.
279 N

d.
126 N
Using your result from above, calculate the kinetic frictional force between the block and the floor.

a.
45.6 N

b.
56.7 N

c.
98.5 N

d.
176.4 N

Determine the work done by friction.

a.
345.2 J

b.
-705.6 J

c.
-980.1 J

d.
1257.9 J
Add up the x-components, ΣF_x , and determine the block's acceleration.

a.
3.7 m/s²

b.
0.91 m/s²

c.
0.56 m/s²

d.
0.38 m/s²

Expert Solution

genius_generous answered 2 years ago

A person is pulling a 40 kg block of ice across an icy surface at a...

A person is pulling a 40 kg block of ice across an icy surface at a 25 degree angle. If the person is pulling with a force of 42 N, what is the magnitude of the acceleration of the block of ice? you may ignore drag, but not friction. Us=.1 and Uk=.03 I got this wrong on the homework and my teacher said that the normal forces does not equal mg here and that the tension is "pulling up"

A dog in a weight-pulling competition tugs a 50-kg sled a distance of 5 m across...

A dog in a weight-pulling competition tugs a 50-kg sled a distance of 5 m across a snowy track. The dog pulls horizontally with a force of 350 N. The coefficient of kinetic friction between the sled and the snow is 0.05. (Draw yourself a free-body diagram on the sled). The next four questions have to do with this scenario. Determine the work done by the dog. I got the correct work (1750J) Add up the y-components, ΣFy, and determine...

You are pulling a 4 kg object with 21 N at 60 degree with ground. What...

You are pulling a 4 kg object with 21 N at 60 degree with ground. What is acceleration?

A 54-kg box is being pushed a distance of 7.1 m across the floor by a...

A 54-kg box is being pushed a distance of 7.1 m across the floor by a force Upper POverscript right-arrow EndScripts ? whose magnitude is 188 N. The force Upper POverscript right-arrow EndScripts ? is parallel to the displacement of the box. The coefficient of kinetic friction is 0.23. Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work...

A 45.0-kg crate is dragged at constant velocity 8.20 m across a horizontal floor with a...

A 45.0-kg crate is dragged at constant velocity 8.20 m across a horizontal floor with a rope making a 30 degree angle above the horizontal. The coefficient of kinetic friction is 0.250. Find the work done by friction. Give your answer in Joules.

Elmer Fudd pulls a 65.0 kg wooden crate of mass m across the floor with a...

Elmer Fudd pulls a 65.0 kg wooden crate of mass m across the floor with a force F at an angle of 34.0°. The coefficient of friction between the surfaces is m = 0.235. If the crate moves at a constant speed, what is the magnitude of the applied force F?

A worker pushed a 21 kg block 8.0 m along a level floor at constant speed...

A worker pushed a 21 kg block 8.0 m along a level floor at constant speed with a force directed 30° below the horizontal. If the coefficient of kinetic friction between block and floor was 0.30, what were (a) the work done by the worker's force and (b) the increase in thermal energy of the block-floor system?

3) A 2 kg block is sliding at an initial speed of 10 m/s across a...

3) A 2 kg block is sliding at an initial speed of 10 m/s across a surface, encountering a constant friction force of 7 N. How much work is done on the block after it slides 22 cm? Answer: Hint: Does the block gain or lose energy during this process? What sign does this imply for the work done on it? 4) How fast is the block moving after sliding 22 cm? Answer: Hint: You can treat the block like...

A 2.50 m -long, 550 g rope pulls a 14.0 kg block of ice across a...

A 2.50 m -long, 550 g rope pulls a 14.0 kg block of ice across a horizontal, frictionless surface. The block accelerates at 2.40 m/s2 . How much force pulls forward on (a) the ice, (b) the rope? Part A Express your answer with the appropriate units. Part B Express your answer with the appropriate units.

Starting with a speed of 2.50 m/s, a 2.00 kg block slides across a rough horizontal...

Starting with a speed of 2.50 m/s, a 2.00 kg block slides across a rough horizontal surface until it collides with a spring. The spring compresses a distance of 6.00cm as the block comes momentarily to rest. The total distance traveled by the block from its starting position to the position where it comes to rest is 0.800m. If the coefficient of kinetic friction between the block and the surface is 0.100, what is the spring constant of the spring?

Question