Unit 4: Speed, velocity and Acceleration

Front

What is speed?

Back

Speed is the distance traveled per unit of time, typically measured in units like miles per hour (mph) or kilometers per hour (km/h).

Front

What is velocity?

Back

Velocity is the speed of an object in a specific direction. It includes both the magnitude (how fast) and the direction of motion.

Front

What is acceleration?

Back

Acceleration is the rate at which an object changes its velocity. It can occur due to a change in speed or direction.

Front

What is the formula for calculating speed?

Back

Speed = distance/time.

Front

When does an object accelerate?

Back

An object accelerates when it changes its speed or direction.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (only magnitude), while velocity is a vector quantity (magnitude and direction).

Front

What is a vector?

Back

A vector is a quantity that has both magnitude and direction, such as velocity or force.

Front

What is a scalar?

Back

A scalar is a quantity that has only magnitude and no direction, such as speed or temperature.

Front

If a car is moving at a constant speed but changing direction, is it accelerating?

Back

Yes, because acceleration includes changes in direction.

Front

What unit is commonly used to measure speed?

Back

Common units for speed include miles per hour (mph) and kilometers per hour (km/h).