All kinds of formulas Flashcards
1
Q
What even is gravitational potential energy?
A
When an object is above the ground, it has gravitational potential energy (PE) due to Earth’s gravitational pull
2
Q
How much is 1 kJ (kilojoule)?
A
1 kilo Joule is 1000 Joules. Kilo stands for 1000. Just like 1 kilogram, it is the same as 1000 grams.
3
Q
What is 1 MJ (mega-Joule)?
A
Think of it as 1 million Joule.
1 M Joule = 1 MILLION Joule
4
Q
What is “m”
A
m = mass = measured in kg
5
Q
what is ‘h’
A
h = height = measured in m
6
Q
what is ‘g’
A
g = Newtons/kg= measured in N/kg
7
Q
The MA of a lever is 6. What is the input force applied if the output force is 24N? What is the length of the output arm if the input arm is 12 m?
A
N triangle: Load/ Effort x MA Input force = output force / MA Input force = 24N / 6 Therefore Input force = 4
Distance Triangle Input arm/ IMA x Output arm Output arm length = 12 / 6 Output arm length = 2
8
Q
What can effort and load also be called?
A
Input and output force
