Forces and Motion Ch2

Question 1

what is the equation for speed

Answer 1

distance/ time

Question 2

what is velocity

Answer 2

same thing as speed but includes direction

Question 3

what is acceleration

Answer 3

a change in speed (velocity) in a given amount of time
distance/ time/ time

Question 4

what is the measurement for gravity

Answer 4

9.8 m/s/s or 10m/s/s

Question 5

what is the unit for force

Answer 5

newtons (N)

Question 6

what is the tool used to measure force

Answer 6

newtinmeter

Question 7

what is Newtons first law of motion

Answer 7

if no external forces are acting then the object is either:
A) stationary
B) in constant velocity

Question 8

describe terminal velocity

Answer 8

• as objects falling increases in velocity the air resistance increases as well
• eventually the weight=air resistance
• when this happens the object will no longer accelerate and will reach terminal velocity

Question 9

what is the meaning of inertia

Answer 9

an objects resistance to acceleration and deceleration

Question 10

what is resultant force

Answer 10

• the net force applied on an object from multiple sources
• typically seen when 2 forces are acting on an object from opposite directions

Question 11

what is the equation for force

Answer 11

mass (kg) x acceleration (m/s/s)

Question 12

what is 1 newton

Answer 12

1kg moving at an acceleration of 1 m/s/s

Question 13

what is static friction

Answer 13

friction that is present between stationary objects
ag. holding a pen

Question 14

what is dynamic friction

Answer 14

friction created from the movement of objects in constant with each other

it is increased as the speed increases

Question 15

what is friction

Answer 15

when kinetic energy gets converted to thermal energy

Question 16

air resistance is equal to

Answer 16

drag

Question 17

what is the equation for weight

Answer 17

mass (kg) x gravitational field strength (m/s/s) or (N/kg)

Question 18

what is the equation for weight

Answer 18

mass (kg) x gravitational field strength (m/s/s) or (N/kg)

Question 19

what is Newtons third law of motion

Answer 19

every action (force) has an equal and opposite action (force)

Question 20

what is the equation for momentum

Answer 20

mass (kg) x velocity (m/s)

Question 21

what is the equation for resultant force

Answer 21

change in momentum/ change in time

Question 22

what is the equation for impulse

Answer 22

force x time

Question 23

what is a rule on momentum

Answer 23

momentum will be the same value before and after a collision

Question 24

what is a vector

Answer 24

measurement with direction

Question 25

what is a scale

Answer 25

measurement without scale

Question 26

how do you find a total vector when more then one is acting on an object

Answer 26

A) same direction: add B) opposite direction: the difference (minus) C) different direction: the equations