The Way you Move

Question 1

What are the laws on?

Answer 1

motion of anything

Question 2

Define force-

Answer 2

Something which changes the shape or motion of an object

Question 3

what is force measured in

Answer 3

Newtons

Question 4

Forces can:

Answer 4

change the speed of an object
change the direction of movement of an object
change the size or shape of an object

Question 5

Weight

Answer 5

A force that is due to the pull of gravity

Question 6

Mass of an object=

Answer 6

the amount of matter in it
measured in kilograms
remains the same everywhere

Question 7

Balanced forces:

Answer 7

A force is needed to start something moving or to change its direction
Forces are also acting on things that are not moving
If something is staying still the forces acting on it must be balances

Question 8

Newtons first law states

Answer 8

Ever mass stays at rest to moves at a constant speed in a straight line unless a resultant force acts on it

Question 9

Inertia-

Answer 9

an objects resistance to change in motion depending on its mass
It remains the same on earth and in space as it depends on mass

Question 10

1st law

Answer 10

when an object is stationary it needs a force to make it move
the bigger the mass the bigger the force needed to make it move
Moving objects also need a force to stop them moving, as their inertia tends to keep them moving in the same direction

Question 11

Why do you feel pressed back into the seat when a car takes off quickly?

Answer 11

Because your inertia tries to keep you in the same place, it takes some effort to get your body moving at the same speed as the car

Question 12

Why are you thrown forward when a car stops suddenly?

Answer 12

Because your inertia tries to keep you moving forward and it takes the force from your seatbelt to slow you down

Question 13

Newtons 2nd law states:

Answer 13

That when an unbalanced force acts upon an object it accelerates in the same direction of the force. The acceleration is directly proportioned to the mass

F=Ma
(Remember Triangle)

Question 14

Examples newtons 2nd law

Answer 14

weights at the gym

It is easier to throw a lighter object than it is to throw a heavier object

Question 15

2nd law

Answer 15

if you want to move an object to another place you will have to add a force
the size and the direction of the force are important- this is called a vector quantity

Question 16

Acceleration

Answer 16

the rate of change of velocity (m/s/s)
an object accelerates/ decelerates only if a force is applied to it
forces control acceleration but not velocity
Depends on the size of the force and how much mass the object has
a large force accelerated a light object very fast, a small force accelerates a massive object slowly

Question 17

A force is..

Answer 17

an action exerted upon a body in order to change its state of rest or its state of uniform motion in a straight line. Action tends to produce a change in motion.

Question 18

Newtons third law states :

Answer 18

that for every action their is an equal and opposite reaction
the action force and the reaction force are always equal and opposite

Question 19

speed

Answer 19

the rate at which a distance is covered

Question 20

distance

Answer 20

the total length of a journey

Question 21

formula speed, distance and time

Answer 21

speed= distance/ time

triangle: distance
speed time

Question 22

Acceleration formula

Answer 22

a= v-u

t

Question 23

GPE stand for

Answer 23

gravitational potential energy

Question 24

KE stands for

Answer 24

Kinetic energy

Question 25

what is gpe

Answer 25

the energy ‘stored’ in an object that is raised against a gravitation on a field
This energy equals all the energy required to get it there
given the right condition formss it will fall + ‘release’ the energy changing it into different

Question 26

gpe=

Answer 26

mgh
m=mass
g=acceleration due to gravity
h=change in height

Question 27

what is KE

Answer 27

The energy of a moving object. when an object falls its GPE turns into KE

Question 28

KE=

Answer 28

1/2mvsquared
m=mass
v=velocity

Question 29

total energy=

Answer 29

GPE + KE

Question 30

the acceleration of an object depends on…

Answer 30

the net force on the object and the mass of the object

Question 31

when the net force is increased the acceleration..

Answer 31

increases

Question 32

when the net force is decreased the acceleration..

Answer 32

decreases

Question 33

an object with a larger mass needs a…. to move at the same acceleration as an object with a small mass

Answer 33

stronger force

Question 34

an object with a larger mass needs a stronger force to move at the same acceleration as an object with a small mass. This is known as -

Answer 34

newtons second law of motion (f=ma)

Question 35

relationship between distance, speed and time

Answer 35

when an object moves in a straight line at a steady speed, you can calculate its speed if you know how far it travels and how long it takes. Vice versa with distance and time, you can use different variations of the formula to calculate each

Question 36

GPE turning into KE

Answer 36

min gpe, max ke -> 50% gpe, 50 %ke -> max gpe, min ke -> 50% gpe, 50% ke -> min gpe, max ke