Physics

Question 1

What is the British/Imperial System unit for length?

Answer 1

Foot (ft)

Question 2

What is the British/Imperial System unit for weight?

Answer 2

Pound (lb)

Question 3

What is the British/Imperial System unit for time?

Answer 3

Second (s)

Question 4

What is the British/Imperial System unit for mass?

Answer 4

Slug

Question 5

What is the SI unit for length?

Answer 5

Meter (m)

Question 6

What is the SI unit for mass?

Answer 6

Kilogram (kg)

Question 7

What is the SI unit for time?

Answer 7

Second (s)

Question 8

What is the SI unit for current?

Answer 8

Ampere (A)

Question 9

What is the SI unit for amount of substance?

Answer 9

Mole (mol)

Question 10

What is the SI unit for temperature?

Answer 10

Kelvin (K)

Question 11

What is the SI unit for luminous intensity?

Answer 11

Candela (cd)

Question 12

What is an angstrom?

Answer 12

1 x 10^-10 m

Question 13

What is an electron-volt?

Answer 13

1 eV = 1.6 x 10^-19 J

Question 14

What are vector quantities?

Answer 14

Displacement, Velocity, Acceleration, and Force

Question 15

What are scalar quantities?

Answer 15

Distance, Speed, Energy, Pressure, and Mass

Question 16

How do you add or subtract vectors?

Answer 16

Tip to tail

Question 17

What is Force?

Answer 17

F = ma

Question 18

What is Gravitational Force equation?

Answer 18

F = (G(m1)(m2)) / (r^2)

Question 19

What is the Universal Gravitational Constant?

Answer 19

G = 6.67 x 10^-11

Question 20

When one gets further away from Earth’s surface, what happens to the acceleration due to gravity?

Answer 20

g Decreases with increasing height, and g increases as one gets closer to the surface.

Question 21

What are the two types of friction?

Answer 21

Static and Kinetic

Question 22

What is Static friction?

Answer 22

0 less than or equal to Fs less than or equal to (mu)(N)

Question 23

What is kinetic friction?

Answer 23

Fk = (mu)(N)

Question 24

What is larger, the coefficient of static or kinetic friction?

Answer 24

The coefficient of static friction will ALWAYS be larger than the coefficient of kinetic friction

Question 25

What is mass?

Answer 25

Mass is a measure of a body's inertia - the amount of matter in the object

Question 26

What is weight?

Answer 26

Measure of gravitational force on an object's mass

Question 27

How are weight and mass related?

Answer 27

F = mg

Question 28

How is center of mass defined?

Answer 28

x = (sum: (m)(x)) / (sum: (m))

Question 29

Where is the center of mass of a uniform object?

Answer 29

At the geometric center

Question 30

What is Newton's First Law of motion?

Answer 30

A body either at rest or in motion with constant velocity will remain that way unless a net fore acts upon it: (sum: F) = ma = 0.

Question 31

What is Newton's Second Law of motion?

Answer 31

An object of mass m will accelerate when vector sum of the forces results in some non=zero resultant force vector: (sum: F) = ma

Question 32

What is Newton's Third Law of motion?

Answer 32

To every action there is always an opposite but equal reaction

Question 33

What are the equations of linear motion with constant acceleration?

Answer 33

``` v = (v0) + at x = (x0) + (v0)t + (0.5)at^2 v^2 = (v0)^2 + 2ax ```

Question 34

In projectile motion, what is (v)x or Horizontal velocity?

Answer 34

Always constant

Question 35

Which direction does centripedal force always point?

Answer 35

Radially inward

Question 36

What is centripedal force?

Answer 36

Fc = (m)(v)^2 / r

Question 37

If net force is equal to zero, is the object at rest?

Answer 37

Maybe. If net force is 0, then it could be at rest or at constant velocity

Question 38

What is Torque defined as?

Answer 38

Torque = r x F = rFsin(x)

Question 39

What is constant in rotational equilibrium?

Answer 39

Angular velocity