Force and Motion

While on a camping trip, Shane and Katie are traveling in a boat on a river. On their trip, the river's current carries them down the river at a speed of 5 meters per second (m/s). They don't need to row because the current is carrying them in the direction they need to go.   If no other forces are acting on the boat, which of these statements describes the motion of the boat as it travels downstream?

• It speeds up. 
• It slows down. 
•  It stays the same. 
• It changes direction. 

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NGSS.3-PS2-1

NGSS.3-PS2-2

Will and Tammy are moving a dresser. They are arguing about which direction to move it. Will is pushing the dresser with a force of 5 newtons towards Tammy. Tammy is pushing the dresser towards Will with a force of 10 newtons. What happens to the dresser? 

• The dresser does not move. 
• The dresser moves towards Will. 
• The dresser moves towards Tammy. 
• The dresser moves towards Tammy, then back towards Will. 

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______________________ is any push or pull on an object.

• Force
• Mass
• Gravity
• Air Resistance

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What is the meaning of acceleration?

• any change in the speed or direction of an object
• where an object is located
• the pull of gravity on an object

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NGSS.MS-PS2-2

Which scientist gave us the laws of motion?

• George Washington
• John Adams
• Sir Isaac Newton

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Which is harder to stop - an 18 wheeler or a motorcycle?

• motorcycle
• 18 wheeler

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Which would be used to describe how fast an object is moving?

• energy

• force

• mass

• speed

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The force that pulls all objects toward Earth is called_____.

• movement

• free fall

• gravity

• acceleration

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Which of the following is NOT an example of Friction

• Hand rubbing together

• pulling back a rubber band

• using sandpaper to smooth a table

• brakes on a car

What happens when two unequal forces push an object in the same direction?

• The forces add together. The causes the object to move in the direction of the force.

• Some of the engery of motion of the two objects is converted into heat.

• The forces subtract from each other and the object will not move as much.

• The object will not move at all.

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NGSS.3-PS2-1