12/1 - Newton's 2nd Law of Motion

12/1 - Newton's 2nd Law of Motion

​Review - Newton's 1st Law - Law of Inertia

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​An object at rest stays at rest,

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​An object in motion stays in motion,

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​Unless acted on by an unbalanced force.

Multiple Choice

What is Newton's First Law known as? The Law of

• Friction
• Mass
• Inertia
• Gravity

Multiple Choice

What is Newton's First Law

• F=ma

• Every action has an equal and opposite reaction

• An object at rest stays at rest, an object in motion stays in motion, unless acted on by an unbalanced force

• Friction

Multiple Choice

A person is pushed forward into their seatbelt when a car suddenly stops

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

• 1st Law

• 2nd Law

• 3rd Law

• All of the above

Multiple Choice

This person bought coffee and put it on the seat next to them. If they stopped quickly and the coffee spilled which law would that represent?

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

Multiple Choice

You are riding in a vehicle with a coffee cup on the dashboard while traveling 30 km/h. The vehicle makes a sudden stop to avoid hitting the car that has stopped in front of it. Which illustration best demonstrates what would happen to the coffee cup?

Multiple Choice

How does a continental plate demonstrate Newton's law of inertia?

• A continental plate will continue to move until it cracks from the pressure applied by Earth's atmosphere.

• A continental plate will continue to move until it crashes into or slides against another continental plate.

• A continental plate will continue to move until it melts into molten rock from the heat of the Sun.

• A continental plate will continue to move until it travels back to its original location on Earth's surface.

Multiple Choice

A steel ball is at one end of a box that is moving forward as shown. The box suddenly stops. According to Newton's first law, what happens to the steel ball just after the box stops?

• Because of friction, the ball continues rolling forward at the same speed.

• Because of friction, the ball rolls forward at an increase speed.

• Because of inertia, the ball continues rolling forward at the same speed.

• Because of inertia, the ball rolls forward at an increased speed.

Multiple Choice

Which of these best explains why the coin fell straight down into the cup instead of remaining on the index card?

• The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.

• Moving the card applied an action force on the coin. Since the card was gone, gravity applied a reaction force on the coin.

• The card had less mass than the coin, so a smaller force of gravity acted on the card. The larger force of gravity on the coin made it fall.

• The acceleration of the coin falling into the cup was equal and opposite to the acceleration of the card.

Multiple Choice

Marshall and his friends like to skateboard in an empty swimming pool. The picture below shows a cross-section of the swimming pool. Several points along Marshall's path have been labeled. At which point is Marshall's potential energy the greatest?

• Point A

• Point B

• Point C

• Point D

Multiple Choice

The ______ the mass of an object, the ______ force it will take to accelerate.

• smaller, more

• greater, more

• greater, less

• smaller, less

Multiple Choice

The larger the mass you have the _____ force you need to change its motion.

• more
• less

Multiple Choice

According to Newton's second law, if you increase the force applied to an object :

• it accelerates more
• it doesn't move
• you get more inertia
• it decelerates

Multiple Choice

If both rocks are pushed with the same amount of force, which rock would accelerate more?

• The 400kg Rock because it weighs more.

• The 40kg rock because it weighs less.

Multiple Choice

Which grocery basket will have the least acceleration, if both grocery baskets are pushed with the same amount of force?

• The one without groceries because it has more mass.

• The one with groceries because it has more mass.

• The one without groceries because it has the least mass.

• The one with groceries because it has least mass.

Multiple Choice

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

Multiple Choice

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

• Cart 1
• Cart 2
• Cart 3 
• Cart 4

Multiple Choice

Two students are in a baseball game. The first student hits a ball very hard and it has a greater acceleration than the second student who bunts the ball lightly.

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

Multiple Choice

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

Multiple Choice

Will it take more force to push an empty shopping cart or a shopping cart that is full?

• The empty shopping cart
• The full shopping cart
• They will take the same amount of force