Answer: both environments are undergoing succession, but different kinds
Explanation:
There is the force of gravity on you and the ball by the Earth. The other half of the pair would be you and the ball applying the force of gravity on the Earth.
When you dribble the ball the floor applies a normal force on the ball to keep it from going through the floor. The ball applies a normal force back on the floor. There is also a normal force on you when you walk.
There is an applied force by your hand on the ball when you hit the ball down. The ball also applies the same force on your hand in the opposite direction.
The work you put into something is the energy it has afterward (neglecting friction and other so-called non-conservative forces). This is called the work-energy theorem. Think of objects in a gravitational field as "energy piggy banks". If you put X joules of energy into it, that energy will be there as potential energy, stored for later. So if you do 144J of work to elevate the bucket from an initial position, what ever it is initially, the final gravitational energy is 144J greater than before.
Answer:
a) 4.1 J
b) -14 J
c) 4.8 m/s
Explanation:
The energy stored in the spring is given by:
The mechanical energy loss is because of the work done by the friction force.
The friction force (only presented on the inclined surface) is given by:
We need to calculate the length of the ramp in order to calculate the work, the length of the ramp is the hypotenuse:
So the work done by the friction force is:
the angle is 180 degrees because the force is opposite to the motion.
In order the know the final velocity we need to apply the Energy Conservation Theorem:
