Identifying Newton's Laws

Susan gently pushes the tip of her finger against the raser on her penciland the pencil does not move. Which of the following figures best illustrates the interaction of forces between Susan’s finger and her pencil?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

If a person dives out of the raft in the direction indicated by arrow A, the boat will move in the direction indicated by arrow B. Which principle does this illustrate?

• An oobject in motion stays in motion

• inertia

• every action has an equal but opposite reaction

• the greater the mass the less theacceleration

Tags

NGSS.MS-PS2-1

The accompanying graph represents the motion of an object

According to the graph, as time increases, the speed of the object

• decreases

• increases

• stays the same

• all of the above

Tags

NGSS.MS-PS3-1

Kara pushes her big brother on the swing at the playground. After he gets off the swing, her little brother gets on. Kara finds that it is easier to push her little brother than it was to push her big brother. What is the most likely reason for this?

• smaller mass always moves faster than larger mass

• smaller mass always moves slower than larger mass

• less force is needed to move a larger mass

• more force is needed to move a larger mass

Tags

NGSS.MS-PS2-2

A performer pulls a tablecloth out from under a complete set of dinnerware as shown in the illustration. .Which of the following best explains the performer’s success at leaving the dinnerware on the table?

• the inertia of the dinnerware

• the large mass of the tablecloth

• the placement of the dinnerware

• the rough material of the tablecloth

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Two teams are playing tug-of-war with a rope that has a knot in the middle. When they pull with equal but it opposite force, the knot is at rest. However if the blue team pulls with a force of 2200 N and the green team pulls with a force of 2500 N, what is the net force?

• 300 N to the left

• 300 N to the right

• 4700 N to the left

• 4700 N to the right

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student drew a graph that shows the motion of a car as it traveled down a street. When was the car stopped at a stoplight?

• between 1 and 3 minutes

• between 3 and 5 minutes

• between 5 and 8 minutes

• between 8 and 10 minutes

Tags

NGSS.MS-PS3-1

A rope is attached to a block that has a weight of 120 N. When the rope exerts an upward force of 250 N on the block, what is the net force on the block?

• 130 N up

• 370 N up

• 130 N down

• 370 N down

Tags

NGSS.MS-PS2-2

This type of graph is used to describe something about an object.

What could this graph describe?

• friction

• mass

• volume

• speed

Tags

NGSS.MS-PS3-1

The diagram represents a block sliding across a table at a constant speed. All forces are shown except the frictional force.

What is the magnitude of the frictional force on the block?

• 0.8 N

• 1.6 N

• 1.7 N

• 2.5 N

Tags

NGSS.MS-PS2-2