Big Idea 12 and 13

• wind

• friction

• gravity

• cable tension

Tags

NGSS.MS-PS2-4

A toy car rolling along different surfaces will experience different amounts of friction. The toy car would encounter the most friction when rolling on which of the following surfaces?

• a piece of carpet

• a sheet of glass

• a smooth wooden board

• a piece of construction paper

Janiyah is pulling a rope to the left. Cyn'terrea is pulling the rope to the right. The rope stays in the same position. Which of these best explains why the rope does not move?

• the two forces are acting in the same direction.

• the two forces are equal and balance each other out

• two forces cannot act on one object at the same time

• the force to the left is greater than the force to the right.

Tags

NGSS.MS-PS2-2

An object moving along a surface suddenly increases speed. What can cause this to happen?

• it is moved by balanced forces.

• it is moved by two opposite forces.

• it is moved by an unbalanced force.

• it moves on its own.

Tags

NGSS.MS-PS2-2

Which statement best describes what must happen in order for a person to lift an object?

• The force of gravity must be greater than the mass of the object.

• The mass of the object must be greater than the force of gravity.

• The force of gravity must be greater than the upward pull or push on the object.

• The upward pull or push on the object must be greater than the force of gravity

Tags

NGSS.MS-PS2-4

Why does the top magnet appear to float above the bottom magnet?

• a. The magnets are made of different material.

• a. The like poles (N and N, S and S) of the magnets repel each other.

• The opposite poles (N and S) of the magnets repel each other

• The magnets have a different gravitational attraction

Tags

NGSS.MS-PS2-5

Susan designed an experiment to determine the speed of a toy car. She released the car from the top of a ramp. She already had a stopwatch. Which other tool should she use to measure the car’s speed?

• Balance

• inclined plane

• spring scale

• meter stick

Tags

NGSS.MS-PS3-1

A ball is sitting loose on a flat wagon that is going in the direction of the arrow. If the wagon suddenly stops, the ball will

• Also suddenly stop

• Roll forward in the wagon

• Roll backward in the wagon

• Bounce up and down

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How does the mass of the shopping cart affect the amount of force needed to push the cart?

• The greater the mass of the cart, the faster it will travel when you push it.

• The lesser the mass of the cart, the less force required to push it.

• The greater the mass of the cart, the less force required to push it.

• The lesser the mass of the cart, the more force required to push it.

Tags

NGSS.MS-PS2-2

How does removing the books affect the motion of the book case?

• the mass is decreased, making the bookcase move faster

• the gravity is increased, making the bookcase move slower

• the friction is increased, making the bookshelf move slower

• the mechanical energy is decreased, making the bookcase move faster.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2