we did a lab where you time how long it takes for a cart to roll down a plank of wood at difference angles.
1. What are 3 sources of error?
2. What is the cause of the most error?
3. How does friction change with increased angle?
4. Is the acceleration (without friction) uniform?
any help will be VERY MUCH appreciated. THANK YOU!
2007-09-20 12:24:10 · 3 answers · asked by brubabe 5 in Science & Mathematics ➔ Physics
1) variable friction (between teh cart and the plank)
2) timekeeping error (stopwatch accuracy)
3) observation error (how good are your reflexes?)
Probably (3) above
It decreases since the magnitude of the force normal to the plank varies as cos(Φ) and the friction is the normal force times the coefficient of friction (and that coefficient doesn't change)
It better be ☺
Doug
2007-09-20 12:36:55 · answer #1 · answered by doug_donaghue 7 · 0⤊ 0⤋
human error- friction, time
the biggest error is your timming
the larger the angle, the more friction you get
yes because gravity is 9.81m/s^2 and without friction it will be the same
2007-09-20 12:31:18 · answer #2 · answered by Lee C 2 · 0⤊ 0⤋
errors would include time, friction, and drag
friction would be the most significant source of error.
the steeper the angle, the less friction
yes if you can neglect drag (wind resistance)
2007-09-20 12:30:24 · answer #3 · answered by Ira W 2 · 0⤊ 0⤋