forces

Question 1

define scalar

Answer 1

only has magnitude

Question 2

define vector

Answer 2

has magnitude and direction

Question 3

define gravity

Answer 3

non contact force that pulls objects to the center of the earth

Question 4

define terminal velocity

Answer 4

final speed

Question 5

define resultant force

Answer 5

the overall force

Question 6

define contact force

Answer 6

object has to be physically touching for the force to act

Question 7

what are examples of a constant force

Answer 7

friction, air resistance

Question 8

define non contact force

Answer 8

object does not need to be touching for the force to act

Question 9

what are examples of non contact forces

Answer 9

gravity, magnetic forces

Question 10

define mass

Answer 10

the amount of matter an object is made of

Question 11

what is a electrostatic force of attraction

Answer 11

when there are two different forces

Question 12

what is an electrostatic force of repultion

Answer 12

two of the same forces

Question 13

define speed

Answer 13

how fast you are going

Question 14

define distance

Answer 14

how far an object moves

Question 15

define displacement

Answer 15

the direction and distance in a straight line from the start to finish point

Question 16

define deceleration

Answer 16

negative acceleration

Question 17

define uniform acceleration

Answer 17

constant acceleation

Question 18

what is the speed of walking

Answer 18

1.5 m/s

Question 19

what is the speed of running

Answer 19

3 m/s

Question 20

what is the speed of cycling

Answer 20

6 m/s

Question 21

what is the speed of a car

Answer 21

25 m/s

Question 22

what is the speed of a train

Answer 22

30 m/s

Question 23

what is the speed of plane

Answer 23

250 m/s

Question 24

what is the speed of sound

Answer 24

300 m/s

Question 25

define thinking distance

Answer 25

how far a vehicle travels during the drivers reaction time

Question 26

define extension

Answer 26

difference between the original length and stretched length of a spring

Question 27

define acceleration

Answer 27

the change in velocity in a curtain amount of time

Question 28

newtons first law

Answer 28

if the resultant force on a stationary object is zero the object will remain stationary

Question 29

newtons second law

Answer 29

a force on an object is directly proportional to the acceleration

Question 30

newtons third law

Answer 30

when two objects interact the forces they exert are equal and opposite on each other

Question 31

what is inertia

Answer 31

the tendency for motion to remain uncharged