An enthusiastic group of students are busy doing experiments. This time they are

Question

An enthusiastic group of students are busy doing experiments. This time they are exploringelastic and inelastic collisions, much like you will be doing in the upcoming lab.

First, the students consider an elastic collision. The students set up a cart with a spring attached to the force probe much like the setup in Lab 7s Activity 3-2. They weigh the cart assembly and find that its mass is 732.4 g. They launch the cart towards the target and collect the following force-vs.-time data [NOTE: "ms" means "milli-seconds"]:

NOTE: This plot shows actual data collected with a setup as described above.

Assuming a perfectly elastic collision, what is your best estimate of the speed of the cart before the collision? _______________m/s

Again, assuming a perfectly elastic collision, what is your best estimate of the speed of the cart after the collision? __________________m/s

t [ms] F [N] 0.0 0.029 17.1 0.159 34.2 0.253 51.3 0.396 68.4 0.503 85.5 0.647 102.6 0.745 119.7 0.863 136.8 1.062 153.9 1.103 171.0 1.204 188.1 1.381 205.2 1.497 222.3 1.596 239.4 1.682 256.5 1.751 273.6 1.858 290.7 1.964 307.8 2.092 324.9 2.182 342.0 2.290

NOTE: This plot shows actual data collected with a setup as described above.

Explanation / Answer

impulse = force * time = change of momemtun

i.e F* t = mDV

or DV = F*t/m     ,

here Ft= impulse from graph = and   m = 0.7324 kgs

3. i suppose ur question is mistyped as elastic, it must be inelastic

and iif so, in this case,

KE = not conserved =0.5 mui^2 + 0 = 0.5 mfuf^2 + 0.5mf vf^2

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