In the lab, you will be analyzing the collisions of two pucks on air table. The

Question

In the lab, you will be analyzing the collisions of two pucks on air table. The pucks are connected to an electric pulsing system that provides a brief electric pulse 60 times per second. Each pulse results in a spark being produced between the puck and the table. By placing a sheet of paper between the puck and the table, we can use the sparks to record the position of the pucks at regular intervals. The trails of spark marks look very much like this: let us analyze this provide sample collision. You will find a ruler and a protractor in the last page of this prelab. Cut them out and use them to answer the following questions. What is the speed of puck 2 after the collision, in cm/s? (A 5percents margin of error is allowed for this question) Let us take the x axis along the initial direction of puck 1, and y axis perpendicular to that and pointing up. Using the protractor, determine the angle between the x-axis and direction of motion of puck 2 after the collision, in degrees. Now determine the components of the velocity of puck 2 after the collision. V_x' in cm/s v_y' in cm/s:

Explanation / Answer

Puck 1, u1 = 1cm*60/s = 0.6m/s along x axis
Puck 2, u2 = 0.6 cm/s along y axis

m1u1 = m2v2cos(22)
m2u2 = m1v1 + m2v1sin(22)

4)
now, from diagram, v2 = 0.6(cos(22) i +sin(22) j)
speed = 0.6m/s
5)
22 degrees

6) Vx = 55.63 cm/s
Vy = 22.47 cm/s

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