Ch 2 - Describing Motion Review

Front

What is speed?

Back

Speed is the distance traveled per unit of time, typically measured in meters per second (m/s).

Front

How do you calculate speed?

Back

Speed (m/s) = distance (m) / time (s).

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms (kg), while weight is the force exerted by gravity on that mass, measured in newtons (N).

Front

What is a support force?

Back

A support force is a force that acts perpendicular to the surface of an object, preventing it from falling through the surface.

Front

What is gravity?

Back

Gravity is the force that attracts two bodies towards each other, commonly experienced as the force that pulls objects towards the Earth.

Front

What is friction?

Back

Friction is the force that opposes the motion of an object when it is in contact with another surface.

Front

What is a lubricant?

Back

A lubricant is a substance that reduces friction between surfaces in mutual contact, often used to enhance the efficiency of machinery.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion, meaning it will remain at rest or in uniform motion unless acted upon by a force.

Front

What is the formula for calculating acceleration?

Back

Acceleration (m/s²) = (final velocity (m/s) - initial velocity (m/s)) / time (s).

Front

What is the unit of force?

Back

The unit of force is the newton (N), which is defined as the force required to accelerate a one-kilogram mass by one meter per second squared.