Recent content by inkandgold

Actually, I think that my answer to the second question is wrong...it should also be no. The acceleration of an object is constant, regardless of velocity, assuming a constant force such as gravity.

Homework Statement a) Does the initial speed of an object have anything to do with its acceleration? b) Does the direction of an object’s initial velocity have anything to do with its acceleration? Homework Equations N/A The Attempt at a Solution Does the initial speed of an...

Thanks so much, got it now!

Well, I figured out part a! a = 5.4 kg * 9.8m/s/s *.44 = 23.3. Still unsure about the rest though.

Homework Statement The coefficient of static friction between a block and a horizontal floor is 0.44, while the coefficient of kinetic friction is 0.10. The mass of the block is 5.4 kg and it is initially at rest. (a) What is the minimum horizontal applied force required to make the block...

Thank you so much! For the first problem would it be: F = mg sin(theta) - u(mg cos(theta)) = 500*9.8 sin 23 - 0.41(500*9.8 cos 23) = 65.3 N?

Would it be sqrt (75^2 + 132^2) using the Pythagorean theorem?

For problem 2, the horizontal component of the traction force = 2 * 75 * cos (28) = 132 N. Would it just be 132 N + mg?

Problem 2. The forces that act on the leg at rest are the weight (mg). Problem 1. Would it be F = mg sin(theta) - u(mg cos(theta))?

For problem 2, the horizontal component isn't enough apparently. I don't know what the vertical component is though. For problem 1, I have F = mg sin(theta) + u(mg cos(theta)). But I don't think that gets me the right answer. I don't know if I'm setting up my x and y components correctly.

Homework Statement 1) http://i.imgur.com/JbK13.gif The figure below depicts the forces acting on a safe being pushed up an ramp by movers, Fa. The mass of the safe is 500 kg, the coefficient of static friction along the incline is μs = 0.41 and the coefficient of kinetic friction along the...