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Physics

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Jordane Bergnaum

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Cards in this guide (14)
What is kinetic energy

Kinetic energy is the energy that an object has due to its motion or movement. For instance if a car drives into a wall the energy of its movement is what destroys the wall, That energy is kinetic energy.

Note: Heat is also a form of Kinetic energy because heat is the movement (vibration energy) of atoms or molecules.

When the mover pushes the box up the ramp there is friction between the box and the ramp What is the efficiency of the ramp

It depends on the mass of the box, the force exerted, the total displacement and the height the box was moved.

How can you identify a fixed pulley

It is set in one position and cannot move.

apex :)

If it takes 100 N to move a box 5 meters what is the work done on the box

500

What factor of both the wheel and axle can be used to calculate their mechanical advantage

radius

A soccer player sprinting down the field demonstrates which form of energy

kinetic

What the the two main states of mechanical energy

Potential energy and Kinetic energy

Newton's laws of motion are all about what

Newton's laws of motion are about motion.

How would the Chinese people know that a ruler had lost the mandate of

heaven

How much work is done to increase a 20 kg scooters speed from 10 ms to 20 ms

3000

In a collision a vehicle that rebounds off the object it trikes experiences less force than if it crumples assuming the time is the same in both situations

false

What force do the brakes use to stop a car

the brakes use friction to stop the car

Does speed affect gravitational potential energy of an object

Does speed 'effect' the gravitational potential energy of an object? No, but gravitational potential energy can be converted into kinetic energy - so the gravitational potential energy can effect the speed.

Ep = mgh

Energy Potential = mass * 9.81 (gravity) * height

Speed / Velocity is absent from that equation.

What statement best describes what happened to the groups on separate reservations

They became culturally different from one another.

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