Ask AI: A cinder block sits on a platform 20 meters high. If it has a mass of 8 kg, find its energy.

The energy we are considering here is the potential energy due to the cinder block's height above the ground. The formula for gravitational potential energy (PE) is: \[ \text{PE} = m \cdot g \cdot h \] where: - \( m \) is the mass of the object (8 kg in this case), - \( g \) is the acceleration due to gravity (approximately \( 9.8 \, \text{m/s}^2 \) on the surface of the Earth), - \( h \) is the height above the ground (20 meters in this case). Now, let's plug in the values: \[ \text{PE} = 8 \, \text{kg} \cdot 9.8 \, \text{m/s}^2 \cdot 20 \, \text{m} \] \[ \text{PE} = 8 \cdot 9.8 \cdot 20 \] \[ \text{PE} = 1568 \, \text{J} \] So, the potential energy of the cinder block is 1568 joules.