Forces

Question 1

is force a scalar or vector quantity

Answer 1

vector quantity

Question 2

what unit are forces measured in

Answer 2

Newtons (N)

Question 3

how do you show direction in diagrams

Answer 3

using arrows

Question 4

newton’s first law

Answer 4

in the absence of unbalanced forces, a body will remain at rest, or if moving will continue to move in a straight liner at a constant velocity

Question 5

what will an object do if the forces on it are balanced

Answer 5

1. if an object is moving it will continue to move at a steady speed
   2.m if the object is not moving it will continue to remain at rest

Question 6

what will an object do if the forces on it are unbalanced

Answer 6

1. speed up
2. slow down
3. change direction

Question 7

a change of velocity is known as ___________

Answer 7

acceleration

Question 8

newton’s second law

Answer 8

the acceleration of an object is inversely proportional to its mass, directly proportional to the resultant force on it and takes place in the same direction as the unbalanced force

Question 9

resultant force

Answer 9

the combined effect of all the forces on an object is called the resultant force

Question 10

newton’s 3rd law

Answer 10

'’every action force has an equal and opposite reaction force’’

Question 11

friction is a force that _________________________

Answer 11

opposes motion

Question 12

friction is meaured in

Answer 12

newtons

Question 13

what is friction useful for

Answer 13

Walking, breaking

Question 14

what is friction a nuisance in

Answer 14

drag, air resistance

Question 15

mass

Answer 15

the amount of matter in an object

Question 16

weight

Answer 16

a force due to the pull of gravity on the object

Question 17

is mass a scalar or vector quantity

Answer 17

scalar

Question 18

is weight a scalar or vector quantity

Answer 18

vector

Question 19

unit of mass

Answer 19

kg

Question 20

unit of weight

Answer 20

newtons (N)

Question 21

does mass ever change

Answer 21

no

Question 22

can the value of weight change

Answer 22

yes depending on the pull of gravity

Question 23

formula of weight

Answer 23

w=mg

/__W__\
/M|G\

Question 24

what happens if there is no gravitational force

Answer 24

objects because weightless but they still have a mass

Question 25

how do objects fall in the absence of air resistance

Answer 25

they all fall at the same rate
(10m/s2)

Question 26

how can air resistance be effected by area and speed

Answer 26

area- the bigger the surface area of an object the bigger the air resistance
speed- as speed increases air resistance increases