# I have a quiz

• Jul 19th 2006, 11:06 AM
Refujoi
I have a quiz
A box sits at the top of an unloading ramp. As the ramp is gradually tilted down from horizontal, the box will eventually start to slide down the ramp; the ramp then stops futher tilting and is held at this angle. Considering friction realistically, once the box starts to slide it is most- likely to then:

a) come to rest in a short distance due to the difference between static and kinetic.
b) continue to slide with increasing acceleration
c) Continue to slide at a constant speed because of friction, and the ramp tilt has stopped increasing.
d) Continuesto slide at a speed increasing with constant acceleration.
• Jul 19th 2006, 12:53 PM
Quick
Quote:

Originally Posted by Refujoi
A box sits at the top of an unloading ramp. As the ramp is gradually tilted down from horizontal, the box will eventually start to slide down the ramp; the ramp then stops futher tilting and is held at this angle. Considering friction realistically, once the box starts to slide it is most- likely to then:

a) come to rest in a short distance due to the difference between static and kinetic.
b) continue to slide with increasing acceleration
c) Continue to slide at a constant speed because of friction, and the ramp tilt has stopped increasing.
d) Continuesto slide at a speed increasing with constant acceleration.

Realistically, I would say answer a.
• Jul 19th 2006, 04:32 PM
topsquark
Quote:

Originally Posted by Refujoi
A box sits at the top of an unloading ramp. As the ramp is gradually tilted down from horizontal, the box will eventually start to slide down the ramp; the ramp then stops futher tilting and is held at this angle. Considering friction realistically, once the box starts to slide it is most- likely to then:

a) come to rest in a short distance due to the difference between static and kinetic.
b) continue to slide with increasing acceleration
c) Continue to slide at a constant speed because of friction, and the ramp tilt has stopped increasing.
d) Continuesto slide at a speed increasing with constant acceleration.