- #1
fronomo
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I'm just going to post a few questions in this post. After missing a day of class I am having difficulty with the homework for the day.
Problem 1
The coefficient of kinetic friction between the 2.0 kg block in figure and the table is 0.260.
What is the acceleration of the 2.0 kg block?
MkN=ff
T=m*a
I went through and calculated the force of friction which gave me 5.096N. However, I'm not entirely sure where to go from there. I know that you need the sum of the forces acting on the 2kg mass in the x direction and divide that by the total mass of the system.
Problem 2
1. Homework Statement
The 100 kg block in figure takes 5.20 to reach the floor after being released from rest.
What is the mass of the block on the left?
T=m*a
I know that I can figure out the exact acceleration based on the time and mass and such, but how would I go about solving for the other mass?
Problem 3
1. Homework Statement
Two packages at UPS start sliding down the ramp shown in the figure. Package A has a mass of 4.00 and a coefficient of kinetic friction of 0.210. Package B has a mass of 9.00 and a coefficient of kinetic friction of 0.140.
How long does it take package A to reach the bottom?
F=m*a
I'm not even really sure how to attempt this problem. I know you can draw a free body diagram and figure out the equal and opposite forces, but where to go from there?
Problem 4
1. Homework Statement
A rope attached to a 20.0 wood sled pulls the sled up a 21.0 snow-covered hill. A 11.0 wood box rides on top of the sled.
If the tension in the rope steadily increases, at what value of the tension does the box slip?
T=m*a
This is another one I'm not real sure how to start on, any ideas?
Thanks for any and all help.
-Chris
Problem 1
Homework Statement
The coefficient of kinetic friction between the 2.0 kg block in figure and the table is 0.260.
What is the acceleration of the 2.0 kg block?
Homework Equations
MkN=ff
T=m*a
The Attempt at a Solution
I went through and calculated the force of friction which gave me 5.096N. However, I'm not entirely sure where to go from there. I know that you need the sum of the forces acting on the 2kg mass in the x direction and divide that by the total mass of the system.
Problem 2
1. Homework Statement
The 100 kg block in figure takes 5.20 to reach the floor after being released from rest.
What is the mass of the block on the left?
Homework Equations
T=m*a
The Attempt at a Solution
I know that I can figure out the exact acceleration based on the time and mass and such, but how would I go about solving for the other mass?
Problem 3
1. Homework Statement
Two packages at UPS start sliding down the ramp shown in the figure. Package A has a mass of 4.00 and a coefficient of kinetic friction of 0.210. Package B has a mass of 9.00 and a coefficient of kinetic friction of 0.140.
How long does it take package A to reach the bottom?
Homework Equations
F=m*a
The Attempt at a Solution
I'm not even really sure how to attempt this problem. I know you can draw a free body diagram and figure out the equal and opposite forces, but where to go from there?
Problem 4
1. Homework Statement
A rope attached to a 20.0 wood sled pulls the sled up a 21.0 snow-covered hill. A 11.0 wood box rides on top of the sled.
If the tension in the rope steadily increases, at what value of the tension does the box slip?
Homework Equations
T=m*a
The Attempt at a Solution
This is another one I'm not real sure how to start on, any ideas?
Thanks for any and all help.
-Chris
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