# The Penultimate Calculating Momentum Quiz

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Momentum refers to the quantity of motion that an object has. Momentum depends upon the variables mass and velocity. In terms of an equation, the momentum of an object is equal to the mass of the object times the velocity of the object. Test out your ability of calculating momentum by taking the penultimate quiz below.

• 1.

### Calculate the momentum of a 0.15 kg ball that is moving toward home plate at a velocity of 40m/s.

• A.

0.0037 kg x m/s

• B.

5 kg x m/s

• C.

26.6667 kg x m/s

• D.

6 kg x m/s

• E.

1 kg x m/s

D. 6 kg x m/s
Explanation
The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the mass of the ball is given as 0.15 kg and its velocity is given as 40 m/s. Multiplying these values gives us a momentum of 6 kg x m/s.

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• 2.

### Which has greater momentum, a 2.0kg hockey puck moving east at 2.5m/s or a 1.3kg hockey puck moving south at 3.0m/s?

• A.

Hockey puck moving east

• B.

Hockey puck moving south

• C.

They have the same momentum

A. Hockey puck moving east
Explanation
The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the momentum of the hockey puck moving east is given by 2.0kg (mass) multiplied by 2.5m/s (velocity), resulting in a momentum of 5.0 kg*m/s. On the other hand, the momentum of the hockey puck moving south is given by 1.3kg (mass) multiplied by 3.0m/s (velocity), resulting in a momentum of 3.9 kg*m/s. Therefore, the hockey puck moving east has a greater momentum than the one moving south.

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• 3.

### A track athlete throws a 2kg discus into a field with a velocity of 21m/s.  What is the momentum of the discus?

• A.

10.5 kg x m/s

• B.

42 kg x m/s

• C.

14 kg x m/s

• D.

0.05 kg x m/s

• E.

48 kg x m/s

B. 42 kg x m/s
Explanation
The momentum of an object can be calculated by multiplying its mass and velocity. In this case, the discus has a mass of 2kg and a velocity of 21m/s. Therefore, the momentum of the discus is 2kg x 21m/s = 42 kg x m/s.

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• 4.

### Calculate the momentum of a 700g ball that is rolling down a ramp at 4.6m/s.

• A.

3.22 kg x m/s

• B.

3,220 kg x m/s

• C.

152.17 kg x m/s

• D.

6.57 kg x m/s

A. 3.22 kg x m/s
Explanation
The momentum of an object can be calculated by multiplying its mass and velocity. In this case, the mass of the ball is given as 700g, which is equal to 0.7 kg. The velocity of the ball is given as 4.6 m/s. Multiplying these values together gives us a momentum of 3.22 kg x m/s.

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• 5.

### A cannon fires a 40.5kg shell toward a target and the shell moves with a velocity of 120m/s.  Calculate the shell's momentum.

• A.

4,860 kg x m/s

• B.

4.86 kg x m/s

• C.

2.45 kg x m/s

• D.

10 kg x m/s

• E.

2,500 kg x m/s

A. 4,860 kg x m/s
Explanation
The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the mass of the shell is given as 40.5 kg and its velocity is given as 120 m/s. By multiplying these two values together, we get the shell's momentum as 4,860 kg x m/s.

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