Exploring Motion and Forces in Physics

What is the unit commonly used for velocity in scientific contexts?

• Kilometers per hour

• Feet per second

• Miles per hour

• Meters per second

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What does acceleration refer to in physics?

• None of the above

• A decrease in speed

• A change in direction or speed

• Constant speed

According to Newton's third law, what happens when two forces interact?

• They multiply

• They create an additional force

• They cancel each other out

• They result in an opposite and equal reaction

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How is momentum calculated in physics?

• Mass divided by velocity

• Velocity divided by mass

• Mass multiplied by acceleration

• Mass multiplied by velocity

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What is the effect of gravity on two different masses falling in a vacuum?

• They fall at different rates

• Heavier objects fall faster

• They fall at the same rate

• Lighter objects fall faster

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What does the concept of work involve in physics?

• Force divided by distance

• Force multiplied by distance

• Distance divided by force

• Force plus distance

What principle explains why all objects fall at the same rate in a vacuum?

• Newton's second law

• Newton's first law

• Newton's third law

• The principle of equivalence

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What is the unit of work in the International System of Units?

• Newton

• Watt

• Joule

• Pascal

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How does a lever reduce the amount of work needed?

• By increasing distance

• By reducing force

• All of the above

• By changing direction of force

Which simple machine might be used to increase force at the expense of distance?

• Lever

• All of the above

• Ramp

• Pulley

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