Newton's laws

Newton's second law is applied as the formula _____

• Force = Mass X Acceleration
• Speed = distance / time
• a + b = c
• huh?

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Forces always act in equal and opposite pairs. (action = reaction)

• Newton's 1st Law

• Newton's 3rd Law

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If there is a big mass, it would need a stronger force to accelerate it.  Which law does this describe?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

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According to Newton's Third Law, if someone jumps off a skateboard, the skateboard will roll backwards because

• the force sent the person forward, there is an equal force pushing back on the skateboard
• the pull of gravity on the person is the same as on the skateboard, regardless of size
• the air resistane on the person is great and the friction on the skateboard is small
• the mass of the skateboard is the same as the mass of the person jumping off

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Which has more Inertia? (Which object will need more force to move it?)

• a Truck

• an iPad

• A cat

• A skateboard

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A 20 kg bike accelerates at 10 m/s². What was the force on the bike?

• 25

• 200 N

• 20 N

• 10 N

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Who is the scientist that came up with the laws of motion and the law of gravity?

• Sir Isaac Netonian
• Sir Isaac Newton
• Albert Einstein
• Alexandar Bell

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What is Newton's Third Law?

• Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force
• Force = mass x acceleration
• For every action there is an equal and opposite reaction

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NGSS.MS-PS2-1

______________ is the tendency of an object at rest to remain at rest, or a moving object to keep moving.

• Mass
• Speed
• Inertia
• Weight

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Newton's first law is also called the law of

• inertia
• gravity
• mass
• velocity