5-1 - Speed and Energy

Front

What is speed?

Back

Speed is a measurement of distance traveled over time, not including the direction of an object.

Front

True or False: A go-cart traveling 64 kilometers per hour is an example of speed.

Back

True

Front

What does velocity include that speed does not?

Back

Velocity includes the direction of an object.

Front

True or False: When you rub your hands together quickly, the friction produces heat.

Back

True

Front

What is an example of velocity?

Back

An example of velocity is 50 miles per hour heading north.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time

Front

What is the unit of measurement for speed?

Back

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

Front

What happens to the energy when you rub your hands together?

Back

The kinetic energy from the movement is converted into thermal energy (heat) due to friction.

Front

What is the difference between speed and velocity?

Back

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

Front

If a car travels 120 kilometers in 2 hours, what is its speed?

Back

Speed = 120 km / 2 h = 60 km/h.