Forces and Motion (P.13.1 and 13.2) Review

True or False. The greater the mass of an object, the smaller the impact of a force will be on that object.

• True

• False

Tags

NGSS.MS-PS2-2

Which of the following best defines the word mass?

• The mass of an object is how much the object weighs

• The mass of an object is the amount of force it takes to move that object

• The mass of an object is the amount of "stuff" in that object

• The mass of an object is how much gravity it takes to keep the object from floating

All of the following are examples of forces except...

• Gravity

• Mass

• Friction

• Inertia

A shopping cart is a compound machine that makes doing work easier. Compound machines have a mechanical advantage far greater. Therefore, a shopping cart makes it much easier to move large masses of groceries from one place to another.

Which force makes it difficult to move the groceries across the floor when the grocery basket is full?

• Gravity

• Friction

• Air Resistance

• Push

A large delivery truck is driving in the mountains, making Christmas deliveries. The truck driver begins to gain too much speed and loses control. He sees a runaway ramp and quickly turns toward to ramp to regain control of the truck. What force does the truck runaway ramp use to keep truck drivers safe?

• Gravity

• Inertia

• Air resistance

• Friction

Tags

NGSS.MS-PS2-2

Gravity is a force that attracts objects toward the Earth. When playing on a metal swing set, how do children on swings not fall to the Earth?

• Gravity does not exist on swing sets

• Air friction overcomes the force of gravity

• The force of gravity is overcome by the metal rods holding up the swing

• The mass of the person on the swing is less than the force of gravity.

Tags

NGSS.MS-PS2-4

Which force takes place when a match is quickly struck against the top edge of a book of matches?

• Friction

• Gravity

• Air Resistance

• Magnetism

Marc and his brother take turns mopping the floor in their father's pizzeria each night. Which force becomes weakened when the floor is wet?

• Air resistance

• Friction

• Magnetism

• Gravity

Ms. Angelotti's students tried sliding across the classroom floor in their tennis shoes but had a hard time. They learned that this was because the friction between the treads of their shoes and the floor was too great.

Which of the following is another example of sliding being difficult because of too much friction?

• Ice skating

• Sliding across a smooth surface in socks

• Treads on new tires moving across a road

• Tripping on a wet floor

True of False. Gravity is only present on Earth.

• True

• False

Tags

NGSS.MS-ESS1-2