Andrew lifts a table 7 meters from the ground floor of her house to his attic. if the
table weighed 20 kg, what is the gravitational potential energy gained by the table?
estimate g as 9.81.
1300
o 1400
1500 j
1600j
1700

1372 J

Explanation:

Gravitational potential energy = m×g×h

m = mass of the object

g = gravitational acceleration

h = elevation

E = 20×9.8×7

= 1372 J

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.