Answer:
the seesaw will still be balanced, nothing will happen to it
Explanation:
the principle of moment states that for a body to be in equilibrium the sum of anticlockwise moment must be equal to the sum of anticlockwise moment
also
The sum of upward forces must be equal to the sum of downward forces
a=weight of the heavy person
b=weit of the lit person
x=distance of the heavy person from the fulcrum
y=distance of the lit person from the fulcrum
now that they both moved 25cm towards the pivot
a*(x-25)= b*(y-25).......................1
Answer:
use different energy sources
Explanation:
Answer:
C
Explanation:
I think c is correct due to reason given by you
Kinetic energy:
1) A car traveling down the road has less kinetic energy than a semi-truck and traveling at the same speed because the car's mass is much less than the truck's.
2) A river flowing at a certain speed possesses kinetic energy because the water has a certain mass and it also has velocity.
3) An insect flying has a small amount of kinetic energy because its mass and velocity are relatively small.
Potential Energy:
1) The food we eat has chemical potential energy because as our body digests it, it provides us with energy for basic metabolism.
2) A stretched spring in a pinball machine has elastic potential energy and can move the steel ball when released.
3) When a crane swings a wrecking ball up to a certain height, it gains more potential energy and has the ability to crash through buildings.
Answer:
Hydrogen fuel cells have a higher energy efficiency. Hydrogen fuel cells create less pollution. Burning fossil fuels relies on outdated devices and technology. Pure hydrogen is more readily available than fossil fuels
Explanation: