Net Forces

What is the effect of friction on motion?

• Friction has no effect on motion.

• Friction accelerates motion, making objects move faster.

• Friction opposes motion, making it harder for objects to move.

• Friction only affects objects at rest.

What is force?

• A push or pull exerted on an object.

• A type of energy that can be converted into work.

• The mass of an object multiplied by its velocity.

• A measure of the distance between two points.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

How do you calculate net force when two forces are acting in the same direction?

• Subtract the magnitudes of the forces from each other.

• Add the magnitudes of the forces together.

• Multiply the magnitudes of the forces.

• Divide the magnitudes of the forces.

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NGSS.MS-PS2-2

What is the relationship between mass and force?

• The greater the mass of an object, the greater the force needed to change its motion.

• Mass and force are unrelated concepts.

• Increasing mass decreases the force required to change motion.

• Force is independent of mass and only depends on velocity.

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NGSS.MS-PS2-2

What does it mean if an object is in motion?

• It means that the object is at rest.

• It means that the object is changing its position over time.

• It means that the object is stationary.

• It means that the object is experiencing a force.

What is an unbalanced force?

• When two forces acting on an object are equal, causing no acceleration.

• When two forces acting on an object are not equal, causing the object to accelerate in the direction of the greater force.

• When a single force acts on an object, resulting in a constant speed.

• When forces are balanced, resulting in a change of direction without acceleration.

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NGSS.HS-PS2-1

What is the unit of force?

• Joule (J)

• Pascal (Pa)

• Newton (N)

• Watt (W)

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NGSS.MS-PS2-1

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If a soccer ball is kicked with a force of 50N to the left, what is the direction of the net force?

• 50N Right

• 50N Up

• 50N Down

• 50N Left

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NGSS.MS-PS2-2

What is inertia?

• The force that causes an object to move in a straight line.

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

• The speed at which an object travels in a vacuum.

• The gravitational pull that affects an object's weight.

How do you calculate net force when two forces are acting in opposite directions?

• Add the two forces together and take the direction of the larger force.

• Subtract the smaller force from the larger force and take the direction of the larger force.

• Multiply the two forces and take the direction of the smaller force.

• Take the average of the two forces and ignore the direction.

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NGSS.MS-PS2-2