Question

Rank the magnitude (absolute value) of the momentum of the following systems from least (1) to most (6)

1. A 100 kg New England Patriot running at 8 m/s toward a 120 kg Denver Bronco running toward the Patriot at 7 m/s
2. A 0.300 kg baseball being thrown with a speed of 40 m/s.
3. A 100 kg go-cart moving at a speed of 9 m/s overtaking another 120 kg go-cart moving in the same direction at 8 m/s.
4. A.020kg bullet flying at 1000 m/s.
5.A 1000 kg car moving with a velocity of +20 m/s toward a 10,000 kg truck moving toward the car with a velocity of -2 m/s.
6. A 10 kg baby crawling at 0.25 m/s. 3

Answer 1

Answer:

The order of the different choices from least (1) to most (6) is as follows:

1  = 5

2 = 6

3 = 2

4 = 4

5 = 1

6 = 3

Explanation:

The total momentum for each system can be expressed as follows:

1) m₁*v₁ +m₂*v₂ = 100kg*8m/s -140kg*7m/s = -40 Kg*m/s

Absolute Value : 40 Kg*m/s

Ranked Nbr. 5.

2) mb*vb = 0.3Kg*40m/s = 12 Kg*m/s

Ranked Nbr. 3

3) m₁*v₁ + m₂*v₂ = 100 kg*9m/s + 120Kg*8m/s = 1,860 Kg*m/s

Ranked Nbr. 6

4) mb*vb = 0.020 kg* 1,000 m/s = 20 kg*m/s

Ranked Nbr. 4

5) mc*vc + mt*vt = 1,000 kg*20 m/s -10,000 kg*2m/s = 0

Ranked Nbr. 1

6) mb*vb = 10 Kg*0.25 m/s = 2.5 Kg*m/s

Ranked Nbr. 2