Newton's Laws

A bowling ball sitting motionless on a table exerts a downward force on the table. The force exerted by the table must be

• less than the force of the ball

• equql to the force of the ball

• more than the force of the ball

• half the force of the ball

Tags

NGSS.MS-PS2-2

A student pushes on an object with a force of 6 newtons and the object does not move. What force does the object exert on the student's hands?

• 4 newtons

• 6 newtons

• 8 newtons

• 10 newtons

Tags

NGSS.MS-PS2-1

The action of swimmers using their arms to propel themselves through the water is an example of what law?

• Newton’s first law of motion

• Newton’s second law of motion

• Newton’s third law of motion

• Newton’s law of inertia

Tags

NGSS.MS-PS2-1

Which is an example of balanced forces?

• a door starting to open

• a basketball being held

• a truck beginning to accelerate

• a book falling off a table

Tags

NGSS.3-PS2-1

A swimmer swims across a pool, and at the end the pool she turns around and pushes off the wall with her feet. Which option describes a pair of action-reaction forces during the push?

• the force of her feet on the wall and the force of the wall on her feet

• the force of gravity on her body and the force of her feet on the wall

• the force of gravity on her body and the force of the wall on her feet

• the force of her feet on the wall and the force of the water on her front

Tags

NGSS.MS-PS2-1

During a classroom discussion on motion, the teacher instructs the class to write down something that specifically addresses Isaac Newton’s second law of motion. Which of these responses would best represent the second law?

• For every action there is an equal and opposite reaction.

• Every object continues at rest unless acted on by outside forces.

• Acceleration depends on the force applied and the mass of an object.

• Every object attracts every other object and the force is proportional to their masses.

Tags

NGSS.MS-PS2-2

When a hammer strikes a nail, the nail

• exerts balanced forces that helps it from moving.

• exerts a force equal to the weight of the hammer.

• exerts an unbalanced force that changes its velocity.

• exerts an equal and opposite force back on the hammer.

Tags

NGSS.MS-PS2-1

A 60-kg man and a 25-kg boy, both on roller skates, push off of each other using their hands. Which of these describes the motion of the two people?

• The man moves farther and faster than the boy.

• The boy moves farther and faster than the man.

• The man moves farther but the same speed as the boy.

• The boy moves faster but the same distance as the man.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of these causes matter to resist a change in motion?

• inertia

• friction

• gravity

• weight

A student walking quickly while carrying an orange on his lunch tray stops suddenly. The orange will most likely roll off the tray due to

• inertia of the orange.

• centripetal force of the orange.

• the friction acting on the orange.

• the balanced forces acting on the orange.

Tags

NGSS.MS-PS2-2