Question

If ball 4 has a mass of 2 kg and it is 5m high, what will be its gravitational potential energy? (g=10 N/kg) *

Answer 1

Step-by-step explanation:

Gravitational potential energy

= mgh

= (2kg)(10N/kg)(5m)

= 100J.

Answer 2

`\boxed {\boxed {\sf 100 \ Joules}}`

Step-by-step explanation:

Gravitational potential energy can be found using the following formula.

`E_p=m*g*h`

where m is the mass, g is the gravitational acceleration, and h is the height.

The mass of the ball is 2 kilograms, its height is 5 meters, and the acceleration due to gravity is 10 Newtons per kilogram.

`m= 2 \ kg \\h= 5 \ m \\g= 10 \ N/kg`

Substitute the values into the formula.

`E_p=(2 \ kg)(10 \ N/kg)(5 \ m)`

Multiply the first 2 numbers. The kilograms (kg) will cancel out when multiplying.

`E_p=(20 \ N)(5 \ m)`

Multiply again.

`E_p=100 \ N*m`

• 1 Newton meter is equal to 1 Joule
• Therefore, 100 N*m= 100 J

`E_p= 100 \ J`

The gravitational potential energy of the ball is 100 Joules.