Unit 4-Week 1

What is the definition of force?

• The resistance to motion of two surfaces that are in contact.

• A push or pull acting on an object, which can cause it to accelerate, slow down, or change direction.

• The rate of change in velocity of an object.

• The tendency of an object to resist changes in its state of motion.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Which of the following is an example of inertia?

• A car speeding up as it merges onto the highway.

• A passenger in a car jerking forward when the brakes are suddenly applied.

• A book resting on a table remains still.

• Pushing a shopping cart in a grocery store.

What is net force?

• The force of attraction between two masses.

• The overall force acting on an object after all forces are combined.

• The resistance to motion of two surfaces that are in contact.

• The quantity of motion of a moving object.

Tags

NGSS.MS-PS2-2

Newton's First Law of Motion states that:

• An object at rest will remain at rest, and an object in motion will remain in motion unless acted on by a net force.

• The rate of change in velocity of an object.

• The force of attraction between two masses.

• The resistance to motion of two surfaces that are in contact.

What are balanced forces?

• Forces that cause a change in an object's motion because they are not equal and opposite.

• Forces that are equal in magnitude and opposite in direction, resulting in no change in motion.

• The force of attraction between two masses.

• The support force exerted by a surface perpendicular to an object resting on it.

Which of the following is an example of unbalanced forces?

• A book resting on a table remains still.

• Kicking a stationary soccer ball causes it to move.

• Rubbing your hands together generates heat due to friction.

• A truck moving at the same speed as a car.

Tags

NGSS.MS-PS2-2

What is acceleration?

• The resistance to motion of two surfaces that are in contact.

• The rate of change in velocity of an object.

• The force of attraction between two masses.

• The quantity of motion of a moving object.

Tags

NGSS.MS-PS2-2

What is friction?

• The resistance to motion of two surfaces that are in contact.

• The force of attraction between two masses.

• The overall force acting on an object after all forces are combined.

• The quantity of motion of a moving object.

What is gravity?

• The resistance to motion of two surfaces that are in contact.

• The force of attraction between two masses, especially the pull exerted by Earth on objects near its surface.

• The rate of change in velocity of an object.

• The quantity of motion of a moving object.

Tags

NGSS.MS-PS2-4

What is momentum?

• The resistance to motion of two surfaces that are in contact.

• The quantity of motion of a moving object, equal to the product of its mass and velocity.

• The force of attraction between two masses.

• The rate of change in velocity of an object.

Tags

NGSS.HS-PS2-2