Lab: Conservation of Linear Momentum Answers

Projectiles that strike objects are good examples of inelastic collisions. A 0.1 kg nail driven by a gas powered nail driver collides in an inelastic collision with a 10 kg block of wood at rest. The total momentum of the system after the collision is 4.8 kg · m/s. Round your answers to two significant digits.

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In this experiment, the was intentionally manipulated. This was the independent variable.

initial momentumstotal momentum✔ final velocity

Consider the example data provided to complete the sentences. After colliding, G1 + G2 travels in a(n) direction as G1 travels before the collision, but at about the magnitude in velocity. The initial momentum of G2 (the magnitude or absolute value) is greater than G1 because its is greater than G1. The percent difference between the total momentum before and after the collision is %.

3/41/2✔ 1/4

velocity✔ massfinal momentum

✔ 0.020.015.0

Refer to your lab guide and review the data in Table B to complete each statement. The mass of G1 + G2 after the collision is kg. The velocity of G1 + G2 after the collision is m/s. The momentum of the combined gliders after the collision is kg · m/s.

Refer to your lab guide and review the data in Table F to complete each statement. The mass of G1 at all times during this trial was kg. The velocity of G1 + G2 after the collision was m/s. The momentum of G1 after the collision was kg · m/s.

In all trials, the magnitude of the final velocity for G1 + G2 was less than the magnitude of any initial velocity. As mass increased, what happened to the velocity?

Read the scenario and choose the correct answers. Imagine you have just witnessed a small avalanche on a mountain while skiing, and two slushy snowballs just crashed together in a perfectly inelastic collision. They are moving as one larger snowball, as a combined mass. Before the collision, snowball A was 7 kg and had initial momentum of –14 kg · m/s; therefore, its velocity must have been m/s. Snowball B had initial momentum of 15 kg ∙ m/s, and a velocity of 5 m/s; therefore, its mass must have been kg. Recognizing that momentum is conserved in inelastic collisions, the total momentum of the combined snowballs after the collision must be kg · m/s.

Cart 1 has an initial velocity and hits Cart 2 which is stationary. After a perfectly inelastic collision, the combined carts are traveling with exactly one third the initial velocity of Cart 1, and in the same direction. Which is correct about the mass of Cart 2?

Projectiles that strike objects are good examples of inelastic collisions. A 0.1 kg nail driven by a gas powered nail driver collides in an inelastic collision with a 10 kg block of wood at rest. The total momentum of the system after the collision is 4.8 kg · m/s. Round your answers to two significant digits. The velocity of the nail and block after the collision is calculated to be m/s. The expected velocity of the nail prior to the collision is m/s.

The simulation kept track of the variables and automatically recorded data on object displacement, velocity, and momentum. If the trials were run on a real track with real gliders, using stopwatches and meter sticks for measurement, how might the data compare? Check all that apply.

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10–2✔ 3

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