Question

a hat that weighs 5 newtons is hanging from a hook 1.5 meters above the floor. how much gravitational potential energy does the hat have

Answer 1

Ep = mgh
= 5×+1.5×10
=75

Answer 2

Answer:

7.49 joules

Explanation:

The formula for gravitational potential energy (P.E) is

P.E = m × g × h

Where, m is mass (in kg)

g is acceleration due to gravity (9.8m/s²)

h is height (in meters)

We were provided with the height in the question to be 1.5 meters. We were also provided with the mass but NOT in kilograms (kg) - 5 newtons - this newton will have to be converted to kilogram as shown below

1kg ⇒ 9.81 newtons

m ⇒ 5 newtons           where m is the mass in kg

m = 5 × 1 / 9.81

m = 0.51 kg

P.E = 0.51 × 9.8 × 1.5

P.E = 7.49 joules