Physical Science 3.1

The rate at which an object moves (NOT considering direction) is called

Average speed = ___ divided by time

__ is the rate at which an object's position changes. It includes direction. An example is 65 kilometers per hour north.

What are the ways an object can accelerate? (There may be more than one answer.)

• Slow down

• Move faster

• Turn

• Keep the same speed

• Have constant velocity

Acceleration is how fast __ changes.

A property that ALL matter has, ___ means that objects will not accelerate on their own; a force must be applied.

• weight

• momentum

• velocity

• inertia

• equilibrium

What is the equation for Newton's 2nd law of motion?

• F = m ÷ a

• F = ma

• a = Fm

• F = a ÷ m

• m = Fa

The metric unit of force, the newton, is based on what three quantities?

• Miles, pounds, and seconds

• Grams, kilometers, and seconds

• Kilograms, meters, and seconds

• Kilometers, kilograms, and seconds

Tags

NGSS.HS-PS2-1

When the sum of forces is zero, a system is in __ and there will be no changes to the object's motion.

• momentum

• inertia

• equilibrium

• static friction

Tags

NGSS.MS-PS2-2

Net force is the product of what two things?

• Velocity and acceleration

• Velocity and mass

• Mass and acceleration

• Mass and time

• Acceleration and time

Tags

NGSS.MS-PS2-2