PHYSICS - TERM 1 - Forces and Motion

Question 1

What are Parallax errors?

Answer 1

The apparent shift in an object’s position as it is viewed from different angles.

Question 2

What is a zero error?

Answer 2

A type of error in which an instrument gives a reading when the true reading at that time is zero.

Question 3

What are 5 measurements that can be used in daily life?

Answer 3

Distance, mass, time, temperature, volume

Question 4

What is a physical quantity?

Answer 4

A quantity that can be measured.

Question 5

What are 2 features of physical quantities?

Answer 5

Numerical magnitudes and units.

Question 6

What is a numerical magnitude?

Answer 6

The 5 in 5m

Question 7

What is a unit?

Answer 7

A unit is an internationally accepted reference to measure a quantity.

Question 8

What are SI units?

Answer 8

Globally accepted system for measurements.

Question 9

What are Imperial units?

Answer 9

Another system of units, mainly used in the USA.

Question 10

What are fundamental units?

Answer 10

Units that are completely independent.

Question 11

What is the fundamental unit of Length?

Answer 11

Meters

Question 12

What is the fundamental unit of mass?

Answer 12

Kilograms

Question 13

What is the fundamental unit of time?

Answer 13

seconds

Question 14

What is the fundamental unit of temperature?

Answer 14

Kelvin

Question 15

What are the derived units of density?

Answer 15

kg/m^3

Question 16

What are the derived units of speed and velocity?

Answer 16

m/s

Question 17

What are the derived units of acceleration?

Answer 17

m/s^2

Question 18

What are the derived units of force?

Answer 18

N / kgms^-2

Question 19

What are the derived units of energy?

Answer 19

J

Question 20

What are the derived units of power?

Answer 20

W

Question 21

What is a scalar?

Answer 21

Quantities which do not have a direction but have magnitude/size

Question 22

What is a vector?

Answer 22

Quantities which have a direction and size.

Question 23

What are some examples of scalars?

Answer 23

volume, density, speed, distance, mass, time, temperature

Question 24

What are some examples of vectors?

Answer 24

velocity, displacement, force, acceleration

Question 25

What is distance?

Answer 25

Length of a path, can have a changing direction, scalar.

Question 26

What is displacement?

Answer 26

Shortest distance between two points, has a fixed direction, vector.

Question 27

What is speed?

Answer 27

Speed is the amount of distance travelled in a unit, it is scalar

Question 28

What is velocity?

Answer 28

Velocity is the displacement per unit time, it is vector.

Question 29

What is mass?

Answer 29

The amount of matter inside an object, scalar

Question 30

What is weight?

Answer 30

The pull on a certain object from the ground (gravity on earth) It is a force Always acts downwards Vector N

Question 31

What is the formula for weight?

Answer 31

W=mg m=mass g=gravitational acceleration

Question 32

What is gravitational acceleration on Earth?

Answer 32

10N/kg

Question 33

How do you calculate average speed?

Answer 33

Total distance travelled / total time taken

Question 34

How do you calculate acceleration?

Answer 34

(v-u)/t v=final velocity u=initial velocity