Speed and Energy

Front

What is speed?

Back

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

Front

What is velocity?

Back

Velocity is speed in a specific direction.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object over time.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field, calculated as PE = mgh (mass x gravity x height).

Front

How is kinetic energy calculated?

Back

Kinetic energy is calculated using the formula KE = 1/2 mv² (1/2 x mass x velocity squared).

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).

Front

At which point of a roller coaster is potential energy the greatest?

Back

Potential energy is greatest at the highest point of the roller coaster.

Front

If a 100kg skydiver jumps from 4000 meters, how much gravitational potential energy do they have?

Back

3920000 J.

Front

If a 50kg person is running at 7m/s, how much kinetic energy do they have?

Back

1225 J.

Front

What is the difference between speed and velocity?

Back

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