Understanding Force and Motion

What is the definition of force?

• Force is the amount of mass in an object.

• Force is a type of energy that can be stored.

• Force is the speed at which an object moves.

• Force is an interaction that causes an object to change its velocity.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What unit is force measured in?

• pascals

• newtons

• joules

• watts

What is Newton's First Law of Motion?

• An object will remain at rest or in uniform motion unless acted upon by an external force.

• An object will change direction only when a force is applied.

• An object will accelerate if no force is applied.

• An object in motion will eventually stop without any force acting on it.

How does friction affect motion?

• Friction only affects stationary objects.

• Friction opposes motion, slowing down or stopping moving objects.

• Friction has no effect on motion.

• Friction increases the speed of moving objects.

Tags

NGSS.MS-PS2-2

What is the difference between mass and weight?

• Mass is the weight of an object; weight is the mass of an object.

• Weight is the amount of matter; mass is the force of gravity on that matter.

• Mass is the amount of matter; weight is the force of gravity on that mass.

• Mass and weight are the same thing; they both measure force.

What is the formula for calculating force?

• F = m + a

• F = m / a

• F = m - a

• F = m * a

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is gravitational force?

• Gravitational force is the energy produced by a mass.

• Gravitational force is the repulsion between two masses.

• Gravitational force is the attraction between two masses.

• Gravitational force is the force that keeps objects in motion.

Tags

NGSS.MS-PS2-4

How do balanced and unbalanced forces affect an object?

• Unbalanced forces have no effect on an object's motion.

• Balanced forces can change an object's speed and direction.

• Balanced forces always cause acceleration.

• Balanced forces keep an object in its current state of motion, while unbalanced forces cause changes in motion.

Tags

NGSS.MS-PS2-2

What is an example of a contact force?

• Gravity

• Electricity

• Magnetism

• Friction

What role does air resistance play in motion?

• Air resistance opposes motion and affects speed and trajectory.

• Air resistance only affects objects in water.

• Air resistance has no effect on motion.

• Air resistance increases speed and enhances trajectory.