Motion And Forces

Question 0

A location to which another location is compared.

Answer 0

Reference point

Question 1

An object’s location.

Answer 1

Position

Question 2

A change of position over time.

Answer 2

Motion

Question 3

A measure of how fast something moves through a particular distance over a definite time period. Speed is distance divided by time.

Answer 3

Speed

Question 4

A speed in a specific direction.

Answer 4

Velocity

Question 5

A quantity that has both size and direction.

Answer 5

Vector

Question 6

The rate at which velocity changes over time.

Answer 6

Acceleration

Question 7

A push; something that changes the motion of an object.

Answer 7

Force

Question 8

The overall force acting on an object when all of the forces acting on it are combined.

Answer 8

Net force

Question 9

A scientific law stating that objects at rest remain at rest and objects in motion remain in motion with the same velocity unless acted on by an unbalanced force.

Answer 9

Newton’s first law

Question 10

The resistance of an object to a change in the speed or the direction of its motion.

Answer 10

Inertia

Question 11

A scientific law stating that the acceleration of an object increases with increased force and decreases with increased mass.

Answer 11

Newton’s second law

Question 12

Any force that keeps an object moving in a circle.

Answer 12

Centripetal force

Question 13

A scientific law stating that every time one object exerts a force on another object the second object exerts a force that is equal in size and opposite in direction back on the first object.

Answer 13

Newton’s third law

Question 14

The use of force to move an object over a distance.

Answer 14

Work

Question 15

A unit used to measure energy and work. One calorie is equal to 4.18 joules of Energy; one joule of work is done when a force of one Newton moves an object one meter.

Answer 15

Joule

Question 16

Stored energy; the energy an object has to its position molecular arrangement or chemical composition.

Answer 16

Potential energy

Question 17

The energy of motion. A moving object has the most kinetic energy at the point where it moves the fastest.

Answer 17

Kinetic energy

Question 18

A combination of the kinetic energy and potential energy an object has.

Answer 18

Mechanical energy

Question 19

As long as you account for all the different forms of energy involved in any process you will find that the total amount of energy never changes.

Answer 19

Conservation of energy

Question 20

The rate at which work is done.

Answer 20

Power

Question 21

The unit of measure for power,which is equal to one joule of work done or energy transferred in one second. For example ,a 75 w light bulb converts electrical energy into heat and light at a rate of 75 joules per second.

Answer 21

Watt

Question 22

The unit of measurement of power for engines and motors. One horsepower equals 745 watts.

Answer 22

Horsepower