Physics

Question 1

Uniform Motion

Answer 1

The term used to describe an object moving in a straight line at a constant speed

Question 2

Average Speed

Answer 2

Uniform motion that involves travelling a certain distance in a specific time

Question 3

How do you graph uniform motion?

Answer 3

The slope of a distance-time graph is a visual representation of the speed of an object.
The greater or steeper the slope indicates a faster speed

Question 4

What is the formula to calculate speed?

Answer 4

Speed = distance/time

Question 5

Scalar

Answer 5

Has magnitude only

Question 6

Vector

Answer 6

Has magnitude and direction

Question 7

What is speed?

Answer 7

A scalar quantity that gives the rate of motion for an object

Question 8

What is the formula to calculate the average speed?

Answer 8

Average speed = distance travelled/time elapsed

Question 9

What is velocity?

Answer 9

A vector quantity that gives the rate of motion and direction for an object

Question 10

What is the formula for velocity?

Answer 10

Velocity = displacement/time elapsed

Question 11

What is distance?

Answer 11

How far something moves

A scalar quantity

Question 12

What is displacement?

Answer 12

The distance and direction of an object’s change in position from it’s starting point

A vector quantity

Question 13

Acceleration

Answer 13

Is the change in velocity per time interval

It is a vector quantity

Question 14

What is the formula for acceleration?

Answer 14

Acceleration = change in velocity/time interval

Question 15

Force

Answer 15

Is defined as a push or pull

Mad magnitude and direction so it is a vector quantity

Is measured in Newton’s

Can change shape or motion of an object

Question 16

What is the formula for force?

Answer 16

F = m*a

Force = mass*acceleration

Question 17

Work

Answer 17

Work is done when force moves an object through a distance

Is scalar

Question 18

What are the conditions for work to take place?

Answer 18

1. There must be movement
2. There must be force applied
3. Force and distance moved must be in the same direction

Question 19

What is the formula for work?

Answer 19

W = F*d

Work = force*distance

Question 20

Potential Energy

Answer 20

Is stored energy
Has the potential to make change occur
Useless unless converted to another form

Question 21

What is the formula for potential energy?

Answer 21

E = mgh

E = massgravity(9.81)height

Question 22

Gravitational Potential Energy

Answer 22

Energy of an object due to its position above the surface of the earth

Question 23

Kinetic Energy

Answer 23

Is the energy due to the motion of an object

Question 24

What is the formula for kinetic energy?

Answer 24

E = 1/2m*v^2

E = 1/2mass*speed^2

Question 25

Mechanical Energy

Answer 25

Is the energy associated with the motion and position of the object

Question 26

What is the formula for mechanical energy?

Answer 26

Mechanical Energy = Kinetic Energy + Potential Energy

Question 27

What are the three types of systems?

Answer 27

Open systems Closed systems Isolated systems

Question 28

What is an open system?

Answer 28

Exchanges both matter and energy with its surroundings

Question 29

What is a closed system?

Answer 29

Cannot exchange matter but can exchange energy with its surroundings

Question 30

What is an isolated system?

Answer 30

Cannot exchange matter or energy with its surroundings

Question 31

What is the formula for the energy in a system?

Answer 31

Energy in a system = heat + work

Question 32

What are the two laws of thermodynamics?

Answer 32

States that the total energy, including heat, in a system and its surroundings remains constant States that heat always flows naturally from a hot object to a cold object, but never from a cold object to a hot object

Question 33

What is the formula to calculate the percentage of efficiency?

Answer 33

Percent efficiency = (output/input)*100