Is potential energy negative or positive?
This is a negative value for two reasons; the force acting between them is attractive, and the zero of potential energy is at infinite separation. This is a negative result if the force between the two charges is attractive (they are opposite) and positive if it is repulsive (the charges are similar).
What 2 things determine the potential energy of an object?
The factors that affect an object’s gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.
Where is potential energy zero?
There are some well-accepted choices of initial potential energy. For example, the lowest height in a problem is usually defined as zero potential energy, or if an object is in space, the farthest point away from the system is often defined as zero potential energy.
How did the potential energy of the two vehicles change did the potential energy of one vehicle change more than the other?
Answer: The potential energy of the two vehicles increased because they were moved against the magnatic forces. The potential energy of the pink car increased more then the potential energy of the purple car because the pink car was closer to the center magnet.
Did the energy you used to lift the notebook get stored in the book as potential energy?
Yes, because you have to use your energy to move so it goes into the notebook which is why when you do more work your tired when you don’t do much work your fine.
What is the kinetic energy of a 3 kg ball that is rolling at 2 m s?
PE= Fwh = (72 m) (966 N) = 69552 Joules 7. What is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per second? KE= ½ m v2 = ½ (3kg) (2 m/s)2 = 6 Joules 8.
What is the formula of potential energy?
The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.
Which is displaying the most potential energy?
Higher objects (with further to fall) have greater potential energy. The heaviest of 2 objects at the same height has the greatest gravitational potential energy.
What are 4 examples of potential energy?
Examples of Gravitational Potential Energy
- A raised weight.
- Water that is behind a dam.
- A car that is parked at the top of a hill.
- A yoyo before it is released.
- River water at the top of a waterfall.
- A book on a table before it falls.
- A child at the top of a slide.
- Ripe fruit before it falls.
What 3 things does potential energy depend on?
What point on the pendulum is the potential energy the highest?
If kinetic energy is highest at the bottom of the pendulum, then that is where potential energy is the lowest. So potential energy would be highest when the pendulum is at its highest point on either side of its motion where it is stationary for an instant.
Which ball has the greatest potential energy?
Ball D
At what point during the swing of a pendulum is the kinetic energy greatest or is it constant during the swing?
At what point during the swing of a pendulum is the kinetic energy greatest, or is it constant during the swing? At lowest point where PE is lowest. At what point during the swing of a pendulum is the mechanical energy greatest, or is it constant during the swing? Constant, because KE=PE+ Emec.
Why does a pendulum eventually stop swinging?
A pendulum is an object hung from a fixed point that swings back and forth under the action of gravity. The swing continues moving back and forth without any extra outside help until friction (between the air and the swing and between the chains and the attachment points) slows it down and eventually stops it.
When a pendulum is at the center position what is true of the kinetic and potential energy?
Explanation: When a pendulum is swinging about its mean position, the total energy is conserved. At the mean position, the kinetic energy is maximum but the potential energy is zero.
Where does energy go when a pendulum stops swinging?
Once the weighted end of the pendulum is released, it will become active as gravity pulls it downward. Potential energy is converted to kinetic energy, which is the energy exerted by a moving object.
Why does a shorter pendulum swing faster?
Why does the angle the pendulum starts at not affect the period? (Answer: Because pendulums that start at a bigger angle have longer to speed up, so they travel faster than pendulums that start at a small angle.)
What is a simple pendulum if you were to suspend?
Answers and Replies. That would be a physical or compound pendulum – i.e. a rigid body suspended from a fixed axis through the object (but not at its center of mass). A small bob suspended by a string would be an example of a simple pendulum.
Does mass affect frequency of a pendulum?
Longer pendulums swing with a lower frequency than shorter pendulums, and thus have a longer period. Mass of the bob at the end of the pendulum-Changing the mass of the pendulum bob does not affect the frequency of the pendulum. Force of gravity-This accelerates the pendulum down.