# Practice Problems Confused on what equations to use!

1. Dec 8, 2008

### vballkatie22

Practice Problems!! Confused on what equations to use!

1. The problem statement, all variables and given/known data

Question 1: Calculate the angle of banking of a curve 200m in radius in order hat traffic moving at 70 km/h may round the curve without depending on friction.

2. Relevant equations

Don't know

1. The problem statement, all variables and given/known data

Question 2: An airplane is gliding in a direction 10 degrees downward from the horizontal. Three forces act upon it: its weight of 10,000N; the lift, perpendicular to the direction of motion; and the drag of air friction, opposite to the direction of motion. Assume the plane moves with constant speed and compute the value of the lift.
2. Relevant equations

Don't know

1. The problem statement, all variables and given/known data

Question 3: A 40kg block is place on a level table and a rope is fastened to it which passes horizontally to a pulley at the edge of the table and thence extends downward to a 1.5kg block suspended from the other end. Neglecting friction, calculate the acceleration and direction of the moving blocks.

2. Relevant equations

Don't know

2. Dec 8, 2008

### mgb_phys

Re: Practice Problems!! Confused on what equations to use!

The first thing to do for each of them is to draw a diagram showing all the forces.

3. Dec 8, 2008

### vballkatie22

Re: Practice Problems!! Confused on what equations to use!

Ok. After that what do I do?

I am trying to figure out what equations to use!

4. Dec 8, 2008

### mgb_phys

Re: Practice Problems!! Confused on what equations to use!

There are no equations as such, you will just have a bunch of forces and angles - the most you will have to do is work out what the component of the forces are in each direction. All you will need is sin and/or cos.