Physical Science Mid-Term

When the first American astronauts were planning to walk on the moon, they knew that the gravity on the moon is less than the gravity on Earth. With this information what did the astronauts expect to be the MOST different on the Moon.

• their mass

• their weight

• their height

• their volume

A brick is resting on a level smooth surface. When a student applies a horizontal force of 5 N to the brick, the force of friction on the brick is also 5 N. Which statement BEST describes the effect of these two forces on the brick?

• The net force on the brick is 0 N, and the brick begins to move.

• The net force on the brick is 0 N, and the brick remains at rest.

• The net force on the brick is 10 N, and the brick begins to move.

• The net force on the brick is 0 N, and the brick remains at rest.

Tags

NGSS.MS-PS2-2

One person pulls on a rope with a force of 400 N to the left. Another person pulls on the rope opposite end with a force of 600 N to the right. What is the unbalanced net force?

• 200 N to the right

• 400 N to the right

• 600 N to the right

• 1000 N to the right

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

What is the Most reasonable explanation for why a toy car rolls farther on a wood floor than on thick carpet?

• The car weighs more on the carpet.

• The car weighs more on the floor.

• The car has more resistance.

• The car weighs less on the wood floor.

Tags

NGSS.3-PS2-1

NGSS.3-PS2-2

In a lab investigation, a student notes that two metal blocks have the same mass. Based on this observation, if the two blocks were put on opposite sides of a balance, they would BEST represent

• balanced forces

• unbalanced forces

• equal and opposite reactions

• objects in motion

When two unequal forces act in opposite directions on a moving object, the object will

• absorb the forces

• come to an immediate stop

• move in the direction of the larger force

• change direction

Tags

NGSS.MS-PS2-2

A ball rolls across the floor and slows down to a stop. Which force caused the ball to slow down.

• friction

• gravity

• inertia

• magnetic

Tags

NGSS.MS-PS2-2

A 20 N object is placed on a surface and starts to slide. What is the MOST likely reason the object begins to move.

• Gravity exerts a balanced force on the object

• An unbalanced force causes acceleration

• Friction is applied to the object

• The force acting on the object is in equilibrium

Tags

NGSS.MS-PS2-2

The diagram above shows

• friction

• gravity

• balanced forces

• unbalanced forces

Tags

NGSS.MS-PS2-2

A box is being pushed to the right with a force of 300 newtons, and to the left with a force of 400 newtons. What is the net force on the box.

• 300 newtons

• 400 newtons

• 700 newtons

• 100 newtons

Tags

NGSS.MS-PS2-2