Calculating GPE mgh Flashcards
1
Q
A skydiver has a mass of 60kg and they are 3000m above the ground when they start their jump. What is their gravitational potential energy?
A
gpe = mgh
= 60 x 10 x 3000
= 1,800,000 J
2
Q
What is the gravitational potential energy of an object if it has a mass of 8kg and a height of 13m?
A
gpe = 8 x 10 x 13
= 1040 J
3
Q
Josie is showing off her new cell phone when it slips out of her hand. The phone has a mass of 0.3kg and falls from a height of 1 m. What is the gpe of the cell phone?
A
gpe = 0.3 x 10 x 1
= 3 J
4
Q
A ball with a mass of 2kg is thrown 9m into the air. How much gpe does the ball have?
A
gpe = 2 x 10 x 9
= 180 J
5
Q
A ball weighs 5N gains 30J of gpe. Calculate how high the ball went
A
H = gpe divided by mg
= 30J divided by 5N
= 6m
