Force and Motion, Balanced and Unbalanced Forces, Speed, Distance, and Time, Inclined Planes Test

Which statement best explains a net force?

• A combination of all motions of an object.

• A combination of all forces acting on an object.

• A combination of all motions of an object in two directions.

• A combination of forces acting on an object in two directions.

Tags

NGSS.MS-PS2-2

Which of the following always causes change in speed, direction, or both?

• A. balanced forces only

• B. unbalanced forces only

• C. either balanced or unbalanced forces

• D. any combination of forces that equals 0 N

Tags

NGSS.MS-PS2-2

When the net forces equal 0 N, they are which of the following?

• A. a push only

• B. a pull only

• C. unbalanced

• D. balanced

Which scenario represents a balanced force?

• Which scenario represents a balanced force?

• B. a child running down a winding path

• C. a swimmer diving into the water

• D. a book sitting on a bookshelf

Which scenario represents an unbalanced force?

• A. a person jumping

• B. a vase sitting on a table

• C. a car driving at a constant velocity

• D. an airplane flying at constant altitude and velocity

Tags

NGSS.MS-PS2-2

A skateboarder pushes the ground with one foot and moves forward. Which statement BEST explains his motion?

• A. The mass of the skateboard decreased causing acceleration to move him forward.

• B. The unbalanced force exerted by the skateboarder’s foot caused him to move forward.

• C. The mass of the student and skateboard increased causing acceleration to move him forward.

• D. The balanced forces on the skateboard allowed it to change his motion and move him forward.

Tags

NGSS.MS-PS2-2

What is the motion of a rolling ball when it encounters a frictional force?

• A. The ball’s speed will increase.

• B. The ball’s speed will decrease.

• C. The ball’s speed will not change.

• D. The ball will speed up and then slow down.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

A rocket is in motion in space. There are no unbalanced forces acting on it. What will the rocket do?

• A. remain in motion at a constant velocity

• B. slow down and change direction

• C. slow down and come to a stop

• D. change speed and go faster

How can an object accelerate?

• A. It can speed up.

• B. It can slow down.

• C. It can change direction.

• D. All the above are examples of acceleration

Tags

NGSS.MS-PS2-2

The amount of force needed to accelerate an object is proportional to its

• A. force

• B. mass

• C. energy

• D. volume

Tags

NGSS.MS-PS2-2