forces

Question 1

what’s friction

Answer 1

a force which opposes motion

Question 2

what’s force measured in

Answer 2

newtons

Question 3

resultant force equation

Answer 3

forward force - backward force

Question 4

newton’s first law

Answer 4

in the absence of unbalanced forces an object will continue to move in a straight line at a constant speed

Question 5

newton’s second law

Answer 5

when acted on by a resultant force an object will accelerate in the direction of the force. the acceleration is directly proportional to the size of the force and inversely proportional to the mass

Question 6

newton’s second law equation

Answer 6

Fres = mxa

Question 7

what’s mass

Answer 7

the amount of matter in an object measured in kg

Question 8

what’s weight

Answer 8

the force due to the pull of gravity on an object measure in newtons

Question 9

value for gravity on earth

Answer 9

10N/kg

Question 10

weight equation

Answer 10

w=mxg

Question 11

how to calculate the height of an object

Answer 11

s= 1/2(u+v)t

Question 12

hookes law

Answer 12

the extension of a spring is directly proportional to the load applied provided the limit of proportionality is not exceeded

Question 13

how to calculate spring constant

Answer 13

force/extension

Question 14

pressure

Answer 14

the force exerted per unit area

Question 15

pressure equation

Answer 15

force/area

Question 16

what does a small area mean for the pressure

Answer 16

high pressure

Question 17

what does a large area mean for pressure

Answer 17

low pressure

Question 18

moment equation

Answer 18

m=fxd

Question 19

principle of moments

Answer 19

when an object is in equilibrium the sum of the clockwise moments about a point are equal to the sum of the anticlockwise moments about the same point

Question 20

what’s centre of gravity

Answer 20

the point where all of an objects weight appears to act

Question 21

what factors affect stability

Answer 21

cofg acts through the base
wide base
low c of g