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Physics

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Era Boyer

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Cards in this guide (15)
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.

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

500

An inclined plane makes work easier by increasing the distance and decreasing the

Force

Does a cart loaded with groceries have more inertia because it has more mass than an empty cart

Yes, a cart loaded with groceries has more inertia because it has more mass than the empty cart. The inertia of any object is determined by the amount of its mass.

The mathematical symbol for period is

T

Is it bad if you have a heavy period on one month and a light one the next month

No it is not bad, as some ladies have a heavy period for one month and then a light one or they may have two heavy periods and then one light one also.

Is momentum a vector quantity because it includes velocity which is also a vector quantity

yes, momentum is a vector quantity.

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

3000

Spaceship 1 and Spaceship 2 have equal masses of 300 kg Spaceship 1 has an initial momentum magnitude of 600 kg-m/s What is its initial speed
A waves period and its frequency have a what relationship

reciprocal

When a waves moves from a less dense medium to a denser one most of the wave energy is refracted

reflected

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

Which of the following items does not use a wheel and axle (Apex)

a bicycle

What law states that energy cannot be created or destroyed

Law of energy conservation. It shows that energy cannot be created or destroyed

Which of the following is considered to be a conservative force

Air resistance

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