Mod 3 Test Review

Explain how force and motion are related.

• Force causes motion.

• Motion causes force.

• Force and motion are unrelated.

• Motion stops force.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is a net force? What SI unit is used to measure force?

• Net force is the sum of all forces acting on an object; the SI unit is Newton.

• Net force is the difference between two forces; the SI unit is Joule.

• Net force is the product of mass and velocity; the SI unit is Pascal.

• Net force is the energy required to move an object; the SI unit is Watt.

Tags

NGSS.MS-PS2-2

What does it mean for forces to be balanced?

• Forces are equal in magnitude and opposite in direction, resulting in no net force.

• Forces are unequal in magnitude, resulting in motion.

• Forces are equal in magnitude and in the same direction, resulting in acceleration.

• Forces are unequal and opposite, resulting in a change of direction.

Tags

NGSS.3-PS2-1

What is the difference between static friction and sliding (kinetic) friction?

• Static friction is the force that keeps an object at rest, while sliding friction is the force that opposes the motion of an object that is already moving.

• Static friction is always greater than sliding friction.

• Sliding friction occurs when two surfaces slide past each other, while static friction occurs when there is no relative motion between the surfaces.

• Static friction is the force that acts on an object at rest, while sliding friction acts on an object in motion.

What is the difference between mass and weight?

• Mass is the amount of matter in an object, while weight is the force exerted by gravity on that object.

• Mass is measured in newtons, while weight is measured in kilograms.

• Mass changes with location, while weight remains constant.

• Mass and weight are the same and can be used interchangeably.

Newton’s first law of motion states that an object will remain at rest or in motion unless acted upon by an external force. Which of the following best describes this law?

• Law of Inertia

• Law of Acceleration

• Law of Action and Reaction

• Law of Universal Gravitation

Which formula do we use for Newton's second law?

• F = m + a

• F = m - a

• F = m * a

• F = m / a

Tags

NGSS.MS-PS2-2

What is the formula that can be derived from Newton’s second law to calculate an object’s ACCELERATION?

• a = F/m

• a = m/F

• a = F*m

• a = F^2/m

Tags

NGSS.HS-PS2-1

What is the acceleration of an object that has a net force of 55 N and a mass of 25 kg? (A=Force/ mass)

• 1.5 m/s²

• 2.2 m/s²

• 2.5 m/s²

• 3.0 m/s²

Tags

NGSS.MS-PS2-2

Newton’s third law of motion states that for every action, there is an equal and opposite _________

• Reaction

• Force

• Acceleration

• Velocity

Tags

NGSS.MS-PS2-1