Force Gravity and Pressure

Question 1

Name some international system units

Answer 1

m, kg, s, A (ampers), K, mol, cd (candelas)

Question 2

What is scalar?

Answer 2

quantity described by a single unit (size, magnitude, mass, temp, length) magnitude only

Question 3

What is vector?

Answer 3

Deals with magnitude and direction (displacement, velocity, acceleration, force) magnitude and direction

Question 4

Is force a vector or a scalar?

Answer 4

a vector

Question 5

What is the sum of all venctors on a given object or system?

Answer 5

net force

Question 6

Is zero NET force the same as zero force?

Answer 6

NO

Question 7

Newton’s first law

Answer 7

an object will remain at rest or in motion indefinitely unless a net force acts upon the object

Question 8

Newton’s second law

Answer 8

Force is proportional to a specific mass and an acceleration in a specific direction

Question 9

Newton’s third law

Answer 9

For each force there is an equal but opposite directed force

Question 10

How is force measured?

Answer 10

Force= mass x acceleration
Newton= kg x m/s/s

Question 11

what is one newton?

Answer 11

the amount of force required to move one kilogram of an object one meter per second per second

Question 12

what is weight?

Answer 12

measure of mass in accordance with it’s gravitational relationship

Question 13

Gravitational Force

Answer 13

any two particles with mass have an additional force between them

Question 14

What does gravity equal?

Answer 14

9.81m/s/s or 32ft/s/s

Question 15

What is a dyne?

Answer 15

way of measuring force when the force is VERY small

gm x cm/ s/s

Question 16

What is pressure?

Answer 16

a measure of a given force dispersed over a specific area

Question 17

How is pressure measured?

Answer 17

P=F/a it is inversely proportional to area and directly proportional to force. Measured in pascals.

Question 18

What is a pascal?

Answer 18

Standard unit of pressure. equal to one newton per meter squared

Question 19

What does one 1 N/m(squared) equal?

Answer 19

102 gms/m squared

Question 20

100kPa equivalents

Answer 20

1 atm, 1 BAR, 760 mmHg, 760 torr, 1020 cmH2O, 14.7 lb/in squared

Question 21

Does atmospheric pressure go up or down as you rise above sea level?

Answer 21

down

Question 22

What is fluid pressure?

Answer 22

the pressure in a fluid is transferrable in an enclosed system. old school BP cuff

Question 23

Gauge Pressure

Answer 23

the pressure reading of a container of some kind above and beyond atmospheric pressure

Question 24

Absolute Pressure

Answer 24

the combination of atmospheric pressure and any pressure ABOVE atmospheric pressure

Question 25

What is the calculation for pressure?

Answer 25

Pressure= Force/ Area

When force is constant and area increases then the pressure decreases