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Flashcards in 2 B & C Deck (24)
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1

True or false: all forces act in pairs

True

2

_________ forces occur when objects touch each other.

Contact

3

The force of _______ pushes objects together

Compression

4

The force of ________ causes the particles in an object to move across each other in layers, like when rocks move past each other

Shear

5

The force of _______pulls on an object, usually in a straight line, like tug of war

Tension

6

The force of ________opposes the motion of objects in contact, like ice grinding against rock.

Friction

7

True or false: field forces have to touch.

false. Field forces DO NOT touch. The object doing the force can attract or repel the objects in the space around it, like MAGNETIC FORCE

8

___________gives things weight and its effects are the most noticeable, like keeping the planets in place.

Gravity

9

What acts against gravity to keep you from sinking into solid ground?

The ground. It pushes back against gravity.

10

What force is lightning?

Electric force

11

What force does a rope use when holding a climber?

Tension

12

_________ is the ability to do work

Energy

13

________ is a force that acts on an object as it moves through a distance.

Work

14

_______ is the ability an object has to do work.

Energy.

Example: when you lift a weight, you use energy.

15

________ energy is an energy that causes things to move, like moving water or a hurricane.

Kinetic

16

___________ energy occurs when a force acting on it gives it the potential to move, like a boulder on top of a peak

Potential

17

A force is a push or a ________

Pull

18

What are 2 kinds of mechanical energy?

Potential and kinetic

19

All objects have thermal energy. The _______ an object is, the more thermal energy it has.

Hotter

Ex: the sun has the most thermal energy

20

________ energy is produced by particle motion moving in the same direction.

Sound energy

Example: music or waves

21

_________ energy is energy that uses electrical charges, like lightning

Electrical

22

Everything that gives of light produces ________ energy

Light

23

When atoms are split, ________ energy forms.

Nuclear

24

Name the principle:
Energy cannot be created or destroyed, but can only be changed from one form to another.

First Law of Thermodynamics

OR

Conservation of Energy