Uniform Circular Motion of streetcar

1. Oct 30, 2005

suspenc3

An old streetcar rounds a flat corner of radius = 9.1m at 4.444 m/s.
What angle with the vertical will be made by the loosely hanging hand straps.

I dont really know what I am looking for, Can anyone Help?

2. Oct 30, 2005

Päällikkö

Start by drawing a diagram. What forces are acting on the hand straps? Think why the hand straps should form any angle with the vertical.

3. Oct 30, 2005

suspenc3

centripetal acceleration would act on the handstraps
a = vsquared/r

a=2.1m/s(squared)

is that all that acts on them

4. Oct 30, 2005

Päällikkö

Almost. What keeps the car (and the hand straps, and pretty much everything else) on ground?

5. Oct 30, 2005

suspenc3

Gravity ?

6. Oct 30, 2005

Päällikkö

Yep.
Now, the direction of the resultant force?

7. Oct 30, 2005

suspenc3

could i do this:

tan(theta) = 9.8m/s(squared) / 2.1m/s(squared

8. Oct 30, 2005

Päällikkö

Yes, but as the requested angle was the angle with the vertical (not horizontal), you should switch the forces' (accelerations', as mass cancels out) places.

9. Oct 30, 2005

suspenc3

ohhh..oops..thats what i meant in the first place

Thanks