Newton's First and Second Laws of Motion

Which car is accelerating?

• A car that is not moving

• A car that rounds a curve at a constant speed

• A car traveling at a constant speed

• A car that has a set speed of 60mph

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Why is the net force 0 in the image?

• Because the elephants are the same size
• Because they are both pulling the same amount of force in opposite directions
• Because they are elephants
• Because they are pulling away from each other.

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According to Newton's second Law, which would take more force to slow down?

• The silver car

• The green car

• They would both take the same force

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Which of these best states Newton's Second Law?

• The greater the mass of an object the greater the force needed to change its motion.

• The greater the mass of an object the less force needed to change its motion.

• The mass of an object does not effect the force needed to change its motion

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Your neighbor is riding her bike around the block. When she slows down and turns a corner, which changes about her?

• her velocity

• her friction

• her speed only

• her balance

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The rate at which an objects velocity changes is called what?

• inertia

• actualization

• acceleration

• completion

Your skateboard begins to slow down when you roll off the sidewalk and across gravel. What is at work?

• gravity

• friction

• balance

• all of the above

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An object at rest will _______ if no outside forces are applied.

• Stay at rest
• Increase Velocity
• Decrease Mass

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The SI units for force are...

• Kilograms
• Newtons
• Meters per second
• Pounds

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Which of the following explains the difference between speed and velocity?

• One has motion, and the other does not.
• One has direction, and the other does not.
• One involves time, and the other does not.
• One involves acceleration, and the other does not.