This 90 kg anvil is about to fall from a 0.9 m high bench. What is its PE? Use g = 9.8 m/s2 for the acceleration due to gravity.

Option D. 793.8 J

Explanation:

From the question given above, the following data were obtained:

Mass (m) of object = 90 Kg

Height (h) = 0.9 m

Acceleration due to gravity (g) = 9.8 m/s²

Potential energy (PE) =...?

Potential energy is simply defined as the energy possessed by an object by reason of its position. Mathematically, it can be expressed as:

PE = mgh

Where:

'PE' is the potential energy.

'm' is the mass of object.

'g' is the acceleration due to gravity.

'h' is the height to which the object is located.

With the above formula, we can obtain the potential energy, PE as follow:

Mass (m) of object = 90 Kg

Height (h) = 0.9 m

Acceleration due to gravity (g) = 9.8 m/s²

Potential energy (PE) =...?

PE = mgh

PE = 90 × 9.8 × 0.9

PE = 793.8 J

Therefore, the potential energy of the object is 793.8 J

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is