A string or rope will break apart if it is placed under too much tensile stress. Thicker ropes can withstand more tension without breaking because the thicker the rope, the greater the cross-sectional area and the smaller the stress. One type of steel has density 7830 kg*m^-3 and will break if...
So, I had a similar question, except the length of my string came out to be 0.3575 m. I don't know what I'm doing wrong, but I got the radius to be 2.05*10^-7 m. Apparently this is wrong.
Here's what I did:
A=2pi*r
r=1.286*10^-6/2pi=2.05*10-7
Can someone try to explain what I'm missing?
ok, so:
-k\sqrt{}v=m(dv/dt)
then integrate the first side from 0 to t and the left side from vo to v
and then solve for v, i got:
v=((-kt-2(v1/2)m)/2m)2
Homework Statement
A rock with mass m slides with initial velocity vo on a horizontal surface. A retarding force FR that the surface exerts on the rock is proportional to the square root of the instantaneous velocity of the rock FR=-kv1/2.
A) Find expression for the velocity of the rock as...