what is the impulse indicated from this graph? impulse – momentum experiment
TRANSCRIPT
What is the impulse indicated from this graph?
Impulse – Momentum Experiment
Starter
What is the average force indicated from this graph?
Impulse – Momentum Experiment
Starter #2
Favg = Area/Dt
Impulse for a Collision
Area = Favg Dt = Impulse = Dp
Impulse – Momentum Experiment
Design an experiment to measure:
1. the impulse during a collision, and
2. the change in momentum ( mvfinal – mvinitial )
Then compare each quantity and see if they are equal.
Impulse = Change in momentum
A force sensor will give you a Force vs. time graph.The motion sensor will read the velocity before and after the collision.Make 8 different runs. Things you can vary: mass of the cart,initial velocity, and elasticity of the collision.
Impulse – Momentum Experiment
m
Vi
Vf
Area
Area = mvf – mvi
Data
trialmass of car (kg)
initial velocit
yfinal
velocity
Dp = m(vf - vi)
Area under F(t) graph
% Difference between Dp and the area
1 2 3 4 5 6 7 8
Lab Report Questions
1. Your lab partner notes that on 1 run, the cart’s initial velocity was .4m/s, and it’s final velocity was also .4 m/s. He concludes that
Dp = 0. Do you agree or disagree? Explain.
2. Sketch a Force vs. t graph for a collision between the cart and a spring with a large spring constant, and one with a smaller constant. Put them on the same graph and label each.
EXIT
Sketch the v vs. tgraph given the F(t)graph. Use the sametime scale for eachAnd draw both in yourjournal.
Science Notebook Lab Checklist
• Starter• Data Table• Sample Calculations• Questions• Summary• Exit