Exploring Forces and Net Force Principles

The video introduces the concept of forces, distinguishing them from fictional portrayals like in Star Wars. It covers types of forces, including contact and non-contact forces, and key physics vocabulary such as force, mass, acceleration, and net force. The video explains net force with examples and calculations, and provides problem-solving exercises to apply these concepts.

Which of the following is an example of a contact force?

• Magnetism

• Electricity

• Friction

• Gravity

What is the unit of force in the metric system?

• Kilogram

• Newton

• Joule

• Meter per second squared

Which symbol is used to represent mass in physics?

• F

• A

• M

• N

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Acceleration is defined as the rate at which an object's _____ is changing.

• Direction

• Speed

• Force

• Mass

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What does the term 'net force' refer to?

• The force due to gravity

• The total force acting on an object

• The force applied by a single object

• The force due to friction

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In the example with the cat and the box, what force opposes the cat's push?

• Electricity

• Friction

• Magnetism

• Gravity

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How do you calculate the net force on an object?

• Multiply the forces

• Add all the forces together

• Divide the applied force by the opposing force

• Subtract the opposing force from the applied force

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If a man pushes a box with 220 newtons and three bears push back with 80 newtons each, what is the net force on the box?

• 20 newtons to the right

• 20 newtons to the left

• 220 newtons to the left

• 240 newtons to the right

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In the spacewalk example, which direction will Ryan Reynolds be pushed?

• Directly to his left

• At a 45-degree angle

• Straight down

• Down and to the left

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In the tug-of-war example, which team wins if the net force is 3 newtons to the left?

• Team Blue

• Neither team

• Team Red

• Both teams

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