Speed velocity acceleration

What is speed?

Speed is the distance traveled per unit of time. It's a scalar quantity.

What is velocity?

Velocity is speed with a direction. It's a vector quantity.

Difference between speed and velocity?

Speed has no direction; velocity does. For example, 60 mph east is velocity.

What is acceleration?

Acceleration is the rate of change of velocity over time. It can be positive or negative.

Fill in the blank: Acceleration = ___ / time.

Acceleration = change in velocity / time.

True or false: Velocity can be negative.

True, because velocity includes direction and an object can move backward.

What does a positive acceleration mean?

A positive acceleration means the object is speeding up.

What does a negative acceleration indicate?

A negative acceleration indicates the object is slowing down.

Formula for speed?

Speed = distance / time, often written as $\displaystyle v = \\frac{d}{t}$.

Question: How is velocity calculated?

Velocity = change in position / time, $\displaystyle v = \\frac{\Delta x}{\Delta t}$.

What unit is speed commonly measured in?

Commonly measured in miles per hour (mph) or meters per second (m/s).

Question: What are the SI units for acceleration?

SI units for acceleration are meters per second squared (m/s²).

True or false: All objects accelerate at the same rate.

False, because acceleration depends on forces acting on the object.

Fill in the blank: Velocity is measured in ___ per second.

Velocity is measured in units like meters per second (m/s) or miles per hour (mph).

Question: What affects acceleration?

Acceleration is affected by net force and mass, according to Newton's second law.

Difference between uniform and variable acceleration?

Uniform acceleration means constant change in velocity; variable acceleration changes at different rates.

What is the formula for acceleration?

Acceleration can be calculated using $\displaystyle a = \\frac{v_f - v_i}{t}$, where $\displaystyle v_f$ is final velocity.

Question: What is instantaneous speed?

Instantaneous speed is the speed of an object at a specific moment in time.