Lab: Conservation of Linear Momentum Answers

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.

3/41/2✔ 1/4

velocity✔ massfinal momentum

✔ 0.020.015.0

Throughout the reflection, make sure you have a copy of the Student Guide and your data tables.

initial momentumstotal momentum✔ final velocity

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.

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Consider the example data provided to complete the sentences.

3/41/2✔ 1/4

velocity✔ massfinal momentum

✔ 0.020.015.0

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.

10–2✔ 3

5✔ 13

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.

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