forces

Question 1

what is velocity?

Answer 1

speed

Question 2

what is acceleration?

Answer 2

change of velocity (speed) over time

Question 3

what is force?

Answer 3

force is energy applied to an object to move

Question 4

what is average speed?

Answer 4

speed=distance/time

Question 5

what mass creates stronger force?

Answer 5

The bigger the mass of an object, the stronger the force. The smaller the mass the weaker the force.

Question 6

why does gravity pull you towards the earth?

Answer 6

because the earth has enormous mass so creates bigger force, force wants to pull things together.

Question 7

if you drop a ball on the side of the earth, where will the ball drop?

Answer 7

towards the center earth.

Question 8

why does friction make it harder for things to slide?

Answer 8

friction makes it harder for things to slide because it creates a force that pushes against the direction something is moving

Question 9

difference between large and small mass?

Answer 9

large mass have stronger force of gravity than objects with small mass

Question 10

what does gravity do?

Answer 10

gravity pull things towards the centre of the earth

Question 11

what happens if forces are unbalanced?

Answer 11

if forces are unbalanced the thrust will be longer

Question 12

what forces is an object when its balanced?

Answer 12

the object when it is balanced is stationary and is at constant speed.

Question 13

when forces on an object are unbalanced?

Answer 13

the object unbalanced is accelerating or decelerating.

Question 14

all objects have what?

Answer 14

all objects have mass

Question 15

mass is measured in what?

Answer 15

mass is measured in grams or kilograms

Question 16

weight is the force applied to?

Answer 16

weight is the force applied to a mass by gravity

Question 17

how does torque increase?

Answer 17

torque increases when force is increased and when a longer lever is used.

Question 18

name 3 contact forces

Answer 18

thrust, friction, support

Question 19

name 3 non-contact forces

Answer 19

magnetic, gravity, electrostatic

Question 20

how does a netforce change motion?

Answer 20

if an object is unbalanced it has netforce because speed shape and direction are uneven

Question 21

how do you calculate netforce?

Answer 21

you take the larger force and subtract to smaller force.

Question 22

pivot

Answer 22

fixed place, eg place to pivot

Question 23

load

Answer 23

object used (to do)

Question 24

effort

Answer 24

where force is applied (like a handle)

Question 25

newtons 1st law

Answer 25

objects stay still or keep moving in straight lines unless something pushes or pulls them

Question 26

2nd law of newton

Answer 26

acceleration on an object depends on force applied to it and its mass

Question 27

3rd law of newton

Answer 27

every action has equal and opposite reaction.

Question 28

how do levers magnify force?

Answer 28

by using a pivot point to apply small effort over long distance to move object (load)

Question 29

a

Answer 29

meters per second ms -2

Question 30

v

Answer 30

meters per second ms -1

Question 31

d

Answer 31

meters per kilogram mpkg

Question 32

t

Answer 32

second hours sph

Question 33

m

Answer 33

gram per kilogram gpkm

Question 34

f

Answer 34

newtons N