Common Assessment #1 Review

This illustration shows the forces, in newtons (N), acting on three blocks. Which boxes will move under these conditions?

• Blocks 1 and 2

• Blocks 2 and 3

• Blocks 1 and 3

• Blocks 1, 2, and 3

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The illustration shows all the forces, in newtons (N), acting on a box. The sum of all the forces acting on the box results in a force acting on the box–

• to the right, with a strength of 11 N.

• to the left, with a strength of 7 N.

• to the right, with a strength of 25 N.

• to the left, with a strength of 6 N.

Tags

NGSS.MS-PS2-2

Students are using an air rocket to investigate the relationship between force and an object’s motion. Students pump air into the rocket. They release the rocket, and the compressed air pushes the rocket upward.

To vary the amount of force acting on the rocket, which of the following should the students change in each trial?

• The length of the hose attached to the pump

• The distance traveled by the rocket

• The amount of air pumped into the rocket

• The height of the rocket from fins to cone

Tags

NGSS.MS-PS2-2

Which of the following graphs shows how the mass of an object affects the amount of force needed to move it?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2

A baseball bat hits a baseball with a force of 100 Newtons. What is the force and its direction exerted by the ball on the bat?

• 100 Newtons, same direction

• 100 Newtons, opposite direction

• 200 Newtons, same direction

• 200 Newtons, opposite direction

Tags

NGSS.MS-PS2-1

According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backwards because -

• the mass of the skateboard is the same as the mass of the person jumping off.

• the pull of gravity on the person is the same as on the skateboard, regardless of size.

• the air resistance on the person is great and the friction on the skateboard is small.

• for the force that sent the person forward, there is an equal force pushing back on the skateboard

Tags

NGSS.MS-PS2-1

The nozzle of a rocket is pointed downward so that as fuel is ignited, the exhaust pushes downward. Why is this arrangement necessary for a rocket to function properly?

• The rocket is protected from the heat of the exhaust.

• Burned fuel can be collected on the ground.

• As the force of the exhaust pushes down, there is an equal and opposite force pushing up on the rocket.

• This allows the rocket to be steered properly.

Tags

NGSS.MS-PS2-1

Newton's third law describes action and reaction forces. A table of four scenarios is provided.

Which of the scenarios described in the table show equal and opposite reaction forces?

• The rocket and balloon

• The rocket and train

• The balloon and girl

• The train and girl.

Tags

NGSS.MS-PS2-1

The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?

• The force of the air resistance on the moving hammer

• The force of the person using the hammer

• The force of gravity pulling down on the hammer

• The force of the nail pushing in the opposite direction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Match the motion graph to the descriptions of motion

• Acceleration

• Constant Speed

• Negative Acceleration

• No Motion

• Moving Backwards

Tags

NGSS.MS-PS3-1