Mechanics Beginning-Projectiles

Question 1

Scalar Quantaties

Answer 1

Temperature, mass, speed, distance, voltage

Question 2

Vector Quantities

Answer 2

Velocity, acceleration, displacement, forces

Question 3

what does t stand for

Answer 3

time

Question 3

what does a stand for

Answer 3

acceleration

Question 3

What does v stand for

Answer 3

final velocity

Question 4

what does s stand for

Answer 4

displacement

Question 4

what does u stand for

Answer 4

initial velocity

Question 4

what does F stand for

Answer 4

Force

Question 5

what does d stand for

Answer 5

distance

Question 6

what does m stand for

Answer 6

mass

Question 7

what does W stand for

Answer 7

weight

Question 8

what does g stand for

Answer 8

gravitational field strength

Question 9

units for g

Answer 9

ms-2 OR Nkg-1

Question 10

units for F

Answer 10

N

Question 11

units for W

Answer 11

N

Question 12

units for m

Answer 12

kg

Question 13

units for s and d

Answer 13

m

Question 14

units for v and u

Answer 14

ms-1

Question 15

units for a

Answer 15

ms-2

Question 16

units for t

Answer 16

s

Question 17

What is Newton’s 1st law

Answer 17

An object remains at rest or in uniform motion unless acted on by a force

Question 18

What is Newton’s 2nd law

Answer 18

F=ma

Question 19

What is Newton’s 3rd law

Answer 19

For every interaction between two objects there is an equal and opposite reaction

Question 20

When does object reach terminal velocity

Answer 20

When air resistance=weight

Question 21

Example of Newton's 3rd law pair

Answer 21

Football on ground: -Ball presses down on ground -Ground reacts to ball -Earth's gravity acts on ball -Ball's gravity acts on earth

Question 22

How must Newton's 3rd law pairs be equal

Answer 22

In type and magnitude

Question 23

How must Newton's 3rd law pairs be opposite

Answer 23

In direction and object it is acting on

Question 24

How to find centre of mass

Answer 24

Suspend objects and hang plum lines

Question 25

What is the centre of mass

Answer 25

Point where mass of an object is thought to be concentrated

Question 26

Why will object fall over

Answer 26

When centre of mass goes over base of the object... AND WHEN THERE IS AN UNBALANCED MOMENT

Question 27

What is the principle of moments

Answer 27

The clockwise moment is equal to the anticlockwise moment

Question 28

How to resolve vectors

Answer 28

trigonometry

Question 29

gradient on distance time graph=

Answer 29

speed

Question 30

gradient of displacement time graph=

Answer 30

velocity

Question 31

gradient of velocity time graph

Answer 31

acceleration

Question 32

area under velocity time graph=

Answer 32

displacement

Question 32

what is gravitational field strength on earth

Answer 32

9.81ms-2

Question 33

what is force vertical on block on ramp

Answer 33

weight

Question 34

force parallel to block on ramp and opposite to direction of motion

Answer 34

friction

Question 35

what is instantaneous speed

Answer 35

speed at particular instant- found using tangent to graph

Question 35

What is average speed

Answer 35

total distance/total time

Question 35

force perpendicular to block on ramp and upwardsish

Answer 35

normal contact force

Question 36

Here you go, have a break well done

Answer 36

https://youtu.be/nDVoMSObJ6s?list=PLuMrAQNtOpsoisWnoodshTKnVUilP0Nsq