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