Newton's 2nd Law

What is Newton's 2nd Law?

• Every action has an equal and opposite reaction

• An object at rest stays at rest, an object in motion stays in motion.

• F = ma

• Friction

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If the man pushes with an equal amount of force, which object will accelerate more?

• Car because it has more mass

• Lawnmower because it has less mass

• Car because it has less mass

• Lawnmower because it has more mass

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A 25 kg bike accelerates at 10 m/s². What was the force?

• 250 N

• 2.5 N

• 25 N

• 15 N

What unit do we measure force in?

• Kilometer/hr

• Joules

• Seconds

• Newtons

A force of 90N is applied to each cart below, which one will accelerate the fastest?

• Cart 1
• Cart 2
• Cart 3 
• Cart 4

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Why would one ball travel a greater distance than the other when pushed with the same amount of force?

• Different sizes
• Different weights
• Different masses
• Different forces

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Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

The masses of four objects are given in this table. If all objects are struck with the same amount of force, which one will have the greatest acceleration?

• Object 1
• Object 2
• Object 3
• Object 4

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Why is a car said to accelerate as it turns a corner at a constant speed?

• Its direction changes

• It doesn't

• It slows down

• Its speeds up

In which of the following scenarios is the car NOT accelerating?

• A car shortly after a stoplight turns green.

• A car approaching a red light

• A car with the cruise control set at 80 km/h

• A car turning a curve at a constant speed