What has more momentum?

A loaded U-haul traveling down Hwy 55

An 18-wheeler parked in the parking lot

Momentum And Electrical Forces

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| By Mrs. Walley

Mrs. Walley

Community Contributor

Quizzes Created: 2 | Total Attempts: 649

Questions: 13 | Attempts: 391 | Updated: Mar 21, 2023

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Questions and Answers

1.

To find the momentum of an object you multiply what to pieces of information?
- A.
  
  Force and distance
- B.
  
  Mass and velocity
- C.
  
  Speed and distance
- D.
  
  Acceleration and force
Correct Answer
B. Mass and velocity

Explanation
To find the momentum of an object, you multiply its mass and velocity. Momentum is a vector quantity that depends on both the mass (a measure of the object's inertia) and the velocity (the object's speed and direction of motion). The formula for momentum is p = m * v, where p is the momentum, m is the mass, and v is the velocity. Therefore, multiplying the mass and velocity of an object gives you its momentum.

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1
0
2.

What has more momentum?
- A.
  
  The Statue of Liberty
- B.
  
  The president riding a bike
- C.
  
  A loaded U-haul traveling down Hwy 55
- D.
  
  An 18-wheeler parked in the parking lot
Correct Answer
C. A loaded U-haul traveling down Hwy 55

Explanation
*Remember momentum is "moving mass"

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1
0
3.

For electricity to occur, ___________ must be moving

Correct Answer
electrons

Explanation
Electricity is the flow of electric charge, and in most cases, this charge is carried by electrons. Electrons are negatively charged particles that are found in atoms. When electrons move from one place to another, they create an electric current, which is the basis of electricity. Therefore, in order for electricity to occur, electrons must be moving.

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4
4.

When you rub a balloon across your hair what happens?
- A.
  
  It deflates
- B.
  
  It neutralizes
- C.
  
  It becomes positively charged
- D.
  
  It becomes negatively charged
Correct Answer
D. It becomes negatively charged

Explanation
When you rub a balloon across your hair, the friction between the balloon and your hair causes electrons to transfer from your hair to the balloon. This results in an excess of electrons on the surface of the balloon, giving it a negative charge.

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5.

What factors affect electric forces?
- A.
  
  Distance between charges
- B.
  
  Mass of the object
- C.
  
  The type of charge (+ or -)
- D.
  
  The amount of the charge
Correct Answer(s)
A. Distance between charges
C. The type of charge (+ or -)
D. The amount of the charge

Explanation
The factors that affect electric forces are the distance between charges, the type of charge (+ or -), and the amount of the charge. The electric force between two charges decreases as the distance between them increases. The type of charge determines whether the forces are attractive or repulsive. Like charges (+ and + or - and -) repel each other, while opposite charges (+ and -) attract each other. Finally, the amount of charge determines the strength of the electric force. The greater the charge, the stronger the force.

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6.

This symbolizes an object being ________________.

Correct Answer(s)
grounded

Explanation
This symbolizes an object being grounded. Grounding refers to the process of connecting an object to the ground or a neutral reference point to prevent the build-up of electrical charges. It helps to ensure the safety of electrical systems and protect against electrical shocks or damage caused by static electricity.

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4
7.

If an object were positively charged it would need to give away electrons to become grounded/neutral.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
If an object were positively charged, it would not need to give away electrons to become grounded/neutral. In fact, it would need to gain electrons in order to neutralize its positive charge and become grounded. Therefore, the statement is incorrect and the correct answer is False.

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8.

A 1200kg four-wheeler has a momentum of 45 kg*m/s. What is the velocity of the four-wheeler?
- A.
  
  0.0375 m/s
- B.
  
  54000 m/s
- C.
  
  375 m/s
- D.
  
  26.7 m/s
Correct Answer
A. 0.0375 m/s

Explanation
The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the momentum of the four-wheeler is given as 45 kg*m/s and its mass is 1200 kg. To find the velocity, we can rearrange the equation and solve for it. Dividing both sides of the equation by the mass gives us the formula: velocity = momentum / mass. Plugging in the given values, we get velocity = 45 kg*m/s / 1200 kg = 0.0375 m/s. Therefore, the velocity of the four-wheeler is 0.0375 m/s.

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9.

What is the momentum of a 10kg bowling ball traveling at a speed of 8.2 m/s?
- A.
  
  1.2 kg*m/s
- B.
  
  82 kg*m/s
- C.
  
  0.82 kg*m/s
- D.
  
  8 kg*m/s
Correct Answer
B. 82 kg*m/s

Explanation
The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the mass of the bowling ball is given as 10kg and its velocity is given as 8.2 m/s. Therefore, the momentum can be calculated as 10kg * 8.2 m/s = 82 kg*m/s.

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10.

If a bowling ball and softball have the same momentum, which would have the greater velocity/speed in order to make up for the difference in mass?
- A.
  
  Same velocity
- B.
  
  Bowling ball
- C.
  
  Softball
Correct Answer
C. Softball

Explanation
The softball would have the greater velocity/speed in order to make up for the difference in mass. This is because momentum is directly proportional to velocity and mass. Since the momentum of both the bowling ball and softball is the same, and the mass of the bowling ball is greater than the mass of the softball, the softball would need to have a greater velocity/speed to compensate for its smaller mass and achieve the same momentum as the bowling ball.

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Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Apr 07, 2015

Quiz Created by
Mrs. Walley

Momentum And Electrical Forces

To find the momentum of an object you multiply what to pieces of information?

What has more momentum?

For electricity to occur, ___________ must be moving

When you rub a balloon across your hair what happens?

What factors affect electric forces?

This symbolizes an object being ________________.

If an object were positively charged it would need to give away electrons to become grounded/neutral.

A 1200kg four-wheeler has a momentum of 45 kg*m/s. What is the velocity of the four-wheeler?

What is the momentum of a 10kg bowling ball traveling at a speed of 8.2 m/s?

If a bowling ball and softball have the same momentum, which would have the greater velocity/speed in order to make up for the difference in mass?