Answer:
Mass is 10 kg
Explanation:
- Gravitational potential energy is calculated by the product of the mass of a body, height and gravitational acceleration.
- That is, GPE = Mass in kg × gravitational acceleration × height in m
In this case;
GPE = 686 J
Height = 7 m
Gravitational acceleration = 9.8 m/s²
Rearranging the formula we can get the mass of the object;
Mass = GPE ÷ (g × h)
= 686 J ÷ (7 m × 9.8 m/s²)
= 10 kg
Therefore, the mass of the object is 10 kg
