Recent content by tigerseye

Could someone help me please? 1.) Find the scalar equation of the line containing P(2, -1, 3) and perpendicular to the lines [x y z]^T=[4 -1 2]^T + t[7 0 1] and [x y z]^T=[-2 0 1] + t[2 3 0]^T. 2.)Find all points C on the line through A(1, -1, 2) and B(2, 0, 1) such that vectors llACll= 2...

A 1500 kg car is approaching a hill shown in the diagram at 10.0 m/s when it suddenly runs out of gas. Assuming the car makes it to the top by coasting, what is the car's speed after coasting down the other side? I tried using 1/2*m*(v_1)^2+mgh_1= 1/2*m*(v_2)^2+mgh_2 but didn't get the right...

An 8.0 kg crate is pulled up a 30 degree incline by a person pulling on a rope that makes an 18 degree angle with the incline. The tension in the rope is 120 N and the crate's coefficient of kinetic friction on the incline is 0.25. If the crate moves 5.0 m, what is the work done by a.)...

Assuming I'm right, I figured k= (2*m*g*mu)/x but I need to get rid of x somehow so that the answer is in terms of mu, m, g, and v only...does anyone have any suggestions? :redface:

Any other help would be greatly appreciated :smile:

Finding the compression of the spring, I found that E_final=E_initial+W_nonconservative where E_final is zero and E_initial=(1/2*m*v^2). What would the W_nonconservative be?

I've been stuck on the same problem for hours. :mad: They ask for the answer in terms of mu, m, g, and v only which is what really screws me up. I know there are all ready a lot of posts but any other help would be great.

I'm stumped on this question: A ball of mass m moving with velocity v_i strikes a vertical wall. The angle between the ball's initial velocity vector and the wall is theta_i as shown on the diagram. The duration of the collision between the ball and the wall is delta t, and this collision is...

I'm still not getting the right answer..any other suggestions?

This problem is driving me insane: An astronaut is initially at rest, at a distance x_1 from the spaceship. She hurls a wrench with a speed v, relative to the spaceship. Find the final distance x_2 between the spaceship and the wrench using some or all of the variables given.

I'm having problems with what equation to use for this question: A 1000 kg steel beam is supported by two ropes. Each rope has a maximum sustained tension of 6000N. Does either rope break?

Can you explain how you got that? :smile:

Now I am supposed to find the magnitude of the vertical acceleration of mass 1, in terms of mass 1, gravity and the tension. I found that a_1= ((m_1*g)-2T)/2m_1 but that isn't right. Any help would be great

Based on the fact that the string is massless, and the system and table are frictionless, how would I find the tension in the string acting on mass 2?

I've been stuck on this problem forever and I don't know how to do it if you can't use r as the radius. A bullet is shot through two cardboard disks attached a distance D apart to a shaft turning with a rotational period T (see the attached picture). Derive a formula for the bullet speed v in...