PHYS261 Final Review- Experiment 3
Questions with Verified Answers
Experiment 3 Purpose - ANSWERSto study the position, velocity, and acceleration of a
body that is acted on by a constant force, uses air track to do this
In this lab, the position of a cart will be measured using a sonic ranger. The ranger
measures the position by (a) radar, (b) using a laser, (b) sonication, (d) triangulation, (e)
using a Hall probe, (f) emitting an ultrasonic pulse. - ANSWERSf) Emitting an ultrasonic
pulse
A cart of mass m = 0.2 kg rides on an air track that is tilted at an angle θ = 2 degrees
from the horizontal. What is the magnitude of the total force on the cart? -
ANSWERSMagnitude of total Force=Mass × 9.8 × sin(θ)
F=mgsin(θ)
Answer: 0.068N
A cart of mass m = 0.25 kg rides on an air track that is tilted at an angle θ = 3 degrees
from the horizontal. What is the magnitude of the cart's acceleration? -
ANSWERSMagnitude of Acceleration = 9.8 × sin(θ)
a=gsin(θ)
Answer: 0.51 m/sec^2
A sonic ranger measures positions x = 0.1 m, 0.15 m, 0.22 m, 0.28 m at times t = 0 s,
0.1 s, 0.2 s, and 0.3 s, respectively. Find the average velocity between t = 0.1 s and t =
0.2 s. - ANSWERSAverage velocity= Change in position/Change in time
v=delta x/delta t
Look at appropriate values for what corresponds to what
Answer: 0.07 m/sec
Suppose you measure g = 9.7 m/s2 with an uncertainty of ∆g=0.06 m/s2. Is this
consistent with the accepted value g = 9.801 m/s2? Hint: find χ2, see section 8 in
Appendix A - ANSWERSYes
Chi-squared=summation((xi-xtheory)/deltax)^2
Chidist(2.83,1)=0.09
USE EXCEL FOR CHIDIST
Questions with Verified Answers
Experiment 3 Purpose - ANSWERSto study the position, velocity, and acceleration of a
body that is acted on by a constant force, uses air track to do this
In this lab, the position of a cart will be measured using a sonic ranger. The ranger
measures the position by (a) radar, (b) using a laser, (b) sonication, (d) triangulation, (e)
using a Hall probe, (f) emitting an ultrasonic pulse. - ANSWERSf) Emitting an ultrasonic
pulse
A cart of mass m = 0.2 kg rides on an air track that is tilted at an angle θ = 2 degrees
from the horizontal. What is the magnitude of the total force on the cart? -
ANSWERSMagnitude of total Force=Mass × 9.8 × sin(θ)
F=mgsin(θ)
Answer: 0.068N
A cart of mass m = 0.25 kg rides on an air track that is tilted at an angle θ = 3 degrees
from the horizontal. What is the magnitude of the cart's acceleration? -
ANSWERSMagnitude of Acceleration = 9.8 × sin(θ)
a=gsin(θ)
Answer: 0.51 m/sec^2
A sonic ranger measures positions x = 0.1 m, 0.15 m, 0.22 m, 0.28 m at times t = 0 s,
0.1 s, 0.2 s, and 0.3 s, respectively. Find the average velocity between t = 0.1 s and t =
0.2 s. - ANSWERSAverage velocity= Change in position/Change in time
v=delta x/delta t
Look at appropriate values for what corresponds to what
Answer: 0.07 m/sec
Suppose you measure g = 9.7 m/s2 with an uncertainty of ∆g=0.06 m/s2. Is this
consistent with the accepted value g = 9.801 m/s2? Hint: find χ2, see section 8 in
Appendix A - ANSWERSYes
Chi-squared=summation((xi-xtheory)/deltax)^2
Chidist(2.83,1)=0.09
USE EXCEL FOR CHIDIST
