Question

What is the mass of an object that has 686J of

gravitational potential energy when it is placed 7m above
the ground?
Your answer

Answer 1

Mass is 10 kg

Step-by-step 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