10.1

Question 1

Investigating force and acceleration tes

Answer 1

-use newton meter to pull trolley along a known distance with constant force
-motion sensor and computer can beusednto record velocity of trolley as accelerates

Question 2

What is formula for resultant force

Answer 2

Resultant force = mass x acceleration
Newtons, kg, metres per sevind squared

Question 3

Whatbis newtons second law

Answer 3

Acceleration of an object is proportional to resultant force on object and inversely proportional to the mass of an object

Question 4

What is inertia

Answer 4

Tendency to stay at rest or in uniform motion

Question 5

What is weight

Answer 5

Rhe weight of an object is the force acting on it due to gravity which is measured in N

Question 6

Shat is mass

Answer 6

Depends on the quantity of matter in it which is measured in kg

Question 7

Formula for weight

Answer 7

Mass x garvitational field strength
N=kgxn/kg

Question 8

What do friction and wir resitance do to vehicle

Answer 8

Oppose driving force of vehicle

Question 9

What si thinking distnace

Answer 9

The distance travlled before the brakes are applied and how long takes for vehicle to react

Question 10

What is braking distnace

Answer 10

Distance travlled by vehicle during the time the braking force acts

Question 11

Factors affecting braking distnace

Answer 11

Mass of vehicle, spped of vehicle, vehicle brakes state, states of tures, state of road

Question 12

Factors affecting thinking distnace

Answer 12

Level of alertness
Drugs or alcohol
Distractions in vehicle
Speed of vehicle

Question 13

What is momentum law of conversation

Answer 13

When 2 objects interwvt in a closed system thier momentum is conserved

Question 14

What is momentum formula

Answer 14

Velocity x mass
Kgm/s=kg x m/s

Question 15

Hwo to tell if object is elastic

Answer 15

If returns to originalnshape when forces deforming it are removed

Question 16

Stretch test

Answer 16

Srping to be tested is calmpednat its uppernemd. An epty weight hanger is attached to the spring to keep it straight.
The length of spring is keasueee using a metre ruler. Original length.
Weight hung from spring is increased by adding weight one at time. Spring stretches each time more weight is hung

Question 17

The extension of spring is…

Answer 17

Directly proportional to the force applied to it, as long as the limit of proportionality is not exceeded. Linear relationship

Question 18

Force applied

Answer 18

Force applied=spring constant x extension
N=n/m x m

Question 19

Inellastic collisions

Answer 19

Objwcts stick togther after the collision so momentum is conserved and kinteic energy is not conserved

Question 20

Elastic collisions

Answer 20

Objects speratebafter collision and momentum is conserved and kinteic energy is conserved