C3 - explaining motion

Question 1

how can you use force and mass to work ut acceleration

Answer 1

force/mass

Question 2

what is inertia

Answer 2

inertia is the ability to resist any change in its motion

Question 3

what is the definition of a newton

Answer 3

one newton is the force that will give a 1 kg object a acceleration of 1 ms-2 in the direction of that force

Question 4

what is the centre of gravity

Answer 4

the point on an object where all the weight appears to act on

Question 5

what is weight

Answer 5

mass x gravity

Question 6

what is the acceleration of free fall

Answer 6

9.81 ms-1 and is the same for any weihgt is air resistance is neglable

Question 7

hen using an electronic timer how cn you work out the height

Answer 7

h = 0.5gt2

Question 8

what are the issue with a electronic timer

Answer 8

magnet may retain some eltromagnetic field slowing down ball so t is longer than necery so we will work out g as too small

Question 9

what is a systematic error

Answer 9

all results a are syetmaticly distorted so that they are too great or too small as a result of the design flaw