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Try It- Task
Try It
Momentum Calculations Practice
For this Try It, you will be working through a few problems to practice momentum calculations. Write out your answers in your notebook and then move to the next tab to check your answer.
Example 1 Answer
Example 1: Calculate the momentum of a 65 kg speed skater moving forward at 15 m/s.
Answer:
- First, identify the known and unknown values.
m = 65 kg
v = 15 m/s
p = ?
- Add the known values to the formula and solve.
p = mv
p = (65 kg)(15 m/s)
p = 975 kg•m/s
- Answer: The momentum of a 65 kg speed skater moving forward at 15 m/s is 975 kg•m/s.
Example 2 Answer
Example 2: Calculate the momentum of a 52 kg cheetah running north at 30 m/s.
Answer:
- First, identify the known and unknown values.
m = 52 kg
v = 30 m/s
p = ?
- Add the known values to the formula and solve.
p = mv
p = (52 kg)(30 m/s)
p = 1560 kg•m/s
- Answer: The momentum of a 52 kg cheetah running north at 30 m/s is 1560 kg•m/s.
Example 3
Calculate the momentum of a 49 kg passenger on an airplane that is connected to the loading gate.
Example 3 Answer
Example 3: Calculate the momentum of a 49 kg passenger on an airplane that is connected to the loading gate.
Answer:
- First, identify the known and unknown values.
m = 49 kg
v = 0 m/s
p = ?
- Add the known values to the formula and solve.
p = mv
p = (49 kg)(0 m/s)
p =0 kg•m/s
- Answer: The momentum of a 49 kg passenger on an airplane that is connected to the loading gate is 0 kg•m/s.
Example 4 Answer
Example 4: Calculate the momentum of a 5 kg baby in a car that is moving eastward at 69 m/s.
Answer:
- First, identify the known and unknown values.
m = 5 kg
v = 69 m/s
p = ?
- Add the known values to the formula and solve.
p = mv
p = (5 kg)(69 m/s)
p = 345 kg•m/s
- Answer: The momentum of a 5 kg baby in a car that is moving eastward at 69 m/s is 345 kg•m/s.
