forces

Question 1

what is a force? (1)

Answer 1

a push, pull or twist

Question 2

how is force measured? (1)

Answer 2

Newtons (N)

Question 3

balanced forces? (2)

Answer 3

when two forces are equally distributed

if a force is balanced, it will remain as it is and wont move

Question 4

unbalanced forces? (2)

Answer 4

when two forces are not equally distributed

if a force is unbalances, it will accelerate in the direction of the net force

Question 5

net force? (2)

Answer 5

the sum of the forces acting on an object

force = mass x acceleration

Question 6

newtons law 1? (1)

Answer 6

an object at rest, remains at rest/ an object in motion will stay in motion unless acted upon

(the literally definition of inertia)

Question 7

newtons law 2? (2)

Answer 7

acceleration/ gaining speed happens when a force acts on a mass (an object)

force = mass x acceleration
acceleration = force / mass
mass = force / acceleration

Question 8

newtons law 3? (1)

Answer 8

every action has an equal and opposite reaction/ force

Question 9

mass? (2)

Answer 9

measure of how much matter in an object

mass = force / acceleration

Question 10

weight? (2)

Answer 10

force due to gravity pulling us back down to earth

weight = mass x gravitational field strength

Question 11

friction? (1)

Answer 11

a force caused by two objects rubbing against each other; restricting or preventing motion

Question 12

air resistance? (1)

Answer 12

a friction that acts on an object in the air

Question 13

tension? (1)

Answer 13

force through a fully stretched object

Question 14

spring force? (1)

Answer 14

force shown by a compressed spring

Question 15

gravity? (1)

Answer 15

the force that pulls you down to earth (weight)

Question 16

normal force? (1)

Answer 16

balances the weight on an object so you don’t fall through the floor

Question 17

applied force? (1)

Answer 17

force applied from one object to another

Question 18

free body diagram? (1)

Answer 18

a force diagram that shows a visual of an object and the forces attached to it

Question 19

terminal velocity? (2)

Answer 19

maximum velocity of a falling object

occurs when the air resistance = the downward force of gravity

Question 20

momentum? (2)

Answer 20

the strength or force something has when moving

momentum = mass x velocity (p = m x v)

Question 21

reaction time? (2)

Answer 21

the length of time taken for a person to respond to a stimulus

affected by alcohol, drugs, fatigue, age and distractions

Question 22

reaction distance? (2)

Answer 22

the distance a car travels while the driver reacts to the stimulus

reaction distance = speed x reaction time (convert speed to m/s)

Question 23

braking distance? (1)

Answer 23

distance from when brakes are fully applied to when it comes to a complete stop

Question 24

stopping distance? (1)

Answer 24

stopping distance = reaction distance + braking distance