Question

introduction to energy
quiz complete
1 2
gabriel is performing an experiment in which he is measuring the energy and work being done by a ball rolling down a hill. which statement best describes gabriels measurements?
they will remain constant.
they will both be recorded in joules.
they will both be recorded in hertz.
they will involve compressions.

Explanation:

• Option 1: Energy and work change as the ball rolls down (kinetic energy increases, potential energy decreases), so they don't remain constant.
• Option 2: Work is calculated as \(W = F\times d\) (force times distance) and energy (e.g., kinetic \(K=\frac{1}{2}mv^{2}\), potential \(U = mgh\)) both have the unit of joule (\(J\)).
• Option 3: Hertz (\(Hz\)) is the unit of frequency, not for work or energy.
• Option 4: Compressions are related to elastic potential energy (e.g., in a spring), not relevant to a ball rolling down a hill in a simple gravitational - potential - to - kinetic energy conversion.

Answer:

They will both be recorded in joules.