P1- motion, forces, energy (Measurement, motion)

Question 1

What must you do when finding speed and the units aren’t SI

Answer 1

Always convert units first

Question 2

What is the standard unit for:
-distance
-temperature
-volume
-time
-mass

Answer 2

-distance - meter (m)
-temperature - kelvin (K)
-volume - millimeters (ml)
-time - seconds (s)
-mass - kilograms (Kg)

Question 3

Which equipment is used to measure
-mass
-volume
-time
-distance
-temperature

Answer 3

-top pan balance
-measuring cylinder
-stopwatch
-ruler, tape, vernier calipers, micrometer
-thermometer

Question 4

What is the accuracy of vernier calipers, ruler, tape and micrometer in millimeters

Answer 4

vernier calipers- 0.1mm
ruler- 1mm
tape- 1mm
micrometer- 0.01mm

Question 5

Name the different units of measurement starting from Giga to Nano and their standard from

Answer 5

-Gigameters (10^9)
-Megameters (10^6)
-Kilometers (10^3)
-Decimeters (10^-1)
-Centimeters (10^-2)
-Millimeters (10^-3)
-Micrometers (10^-6)
-Nanometers (10^-9)

Question 6

What are the two types of quantities

Answer 6

-scalar - has magnitude
-vector - has magnitude & direction

Question 7

Give 6 examples of a scalar quantity

Answer 7

-distance
-time
-temperature
-speed
-energy
-mass

Question 8

Give 5 examples of a vector quantity

Answer 8

-force
-weight
-velocity
-acceleration
-gravitational field strength

Question 9

define velocity

Answer 9

speed with a given direction

Question 10

define speed

Answer 10

distance covered in a given time

Question 11

define acceleration

Answer 11

change in velocity per unit time

Question 12

define deacceleration

Answer 12

negative acceleration

Question 13

define displacement

Answer 13

Object/s overall change in position (how far from start to end)

Question 14

define distance

Answer 14

how far an object moves (how much travelled)

Question 15

what does the flat line in a distance time graph represent

Answer 15

object is stationary

Question 16

what does up line in a distance time graph represent

Answer 16

object moving forward

Question 17

what does the down line in a distance time graph represent

Answer 17

object is going opposite direction

Question 18

What is happening when an object returns to 0 in a distance time graph

Answer 18

object retuned into original place

Question 19

What is the relationship between the gradient and speed in a distance time graph

Answer 19

as gradient increases, speed increases

Question 20

what does the flat line in a speed time graph represent

Answer 20

object is moving at constant speed

Question 21

what does up line in a speed time graph represent

Answer 21

object accelerating

Question 22

what does the down line in a speed time graph represent

Answer 22

negative acceleration

Question 23

How do you get the distance traveled in speed time graph

Answer 23

find the area under the graph

Question 24

What is the relationship between the gradient and speed in a speed time graph

Answer 24

as gradient increases, acceleration increases

Question 25

What is the formula for speed - symbols and word

Answer 25

total distance ---------------------- = speed total time d -- = s t -meters per second (ms^-1)

Question 26

What is the formula for acceleration - symbols and word

Answer 26

final velocity - initial velocity ----------------------------------------- = acceleration time v - u ------ = a t -meters per second squared (ms^-2 / m/s^2)

Question 27

define mass

Answer 27

amount of matter in a object

Question 28

define gravitational field strength

Answer 28

gravitational force per unit mass

Question 29

define freefall

Answer 29

motion under the force of gravity alone

Question 30

what is the earth/s gravitational field strength equal to

Answer 30

freefall acceleration = 9.8 ms^-2/ Nkg^-1

Question 31

define weight

Answer 31

gravitational force acting on an object with mass

Question 32

what is the formula for weight - symbols and words

Answer 32

weight = mass x gravitational field strength w = mg -Newtons (N)

Question 33

What happens to the gravitational field strength on an object and weight as mass increases

Answer 33

mass increases, gravitational field strength on an object increases, weight increases

Question 34

define density

Answer 34

amount of mass in a given volume

Question 35

what is the formula of density - symbols and words

Answer 35

mass ----------- = density volume m ----- = p V -Kgm^-3 / gcm ^-3

Question 36

1m^3 = 1000000cm^3

Answer 36

1m^3 = 1m x 1m x 1m 1m^3 = 100cm x 100cm x 100cm 1m^3 = 1000000cm^3

Question 37

what is required for the density of an object to float

Answer 37

object has to be less dense than water

Question 38

what is required for the density of an object to sink

Answer 38

object has to be more dense than water

Question 39

define liner motion

Answer 39

motion where acceleration is not constant

Question 40

define uniform motion

Answer 40

motion where acceleration is constant