Physics class 1

Question 1

What is the value of g (gravity)

Answer 1

10 m/s2

Question 2

What is the value for Pwater (density of water) in both kg and g

Answer 2

1000 kg/m3

1 g/cm3

Question 3

what is the value for e (elementary electric charge)

Answer 3

1.6 x 10^-19 C

Question 4

What is the value for K0 (Coulomb’s constant)

Answer 4

9x10^9 Nm^2/C^2

Question 5

What is the speed of light in vacuum (c)

Answer 5

3 x 10^8 m/s

Question 6

What is I0 (threshold for hearing)

Answer 6

10^-12 W/m^2

Question 7

What is the difference between free fall and uniform accelerated motion?

Answer 7

in free fall the only acceleration is gravity (10m/s^2

Question 8

What is newtons first law?

Answer 8

The law of inertia, an object in motion will stay in motin and will only change when net force is applied.
This holds true for anything moving at constant velocity

Question 9

What is mass in relation to interia?

Answer 9

it is the resistance to acceleration

Question 10

what is neurons second law?

Answer 10

Fnet = ma

applied net force causes a change in motion

Question 11

Does mass change depending on gravity?

Answer 11

NO, weight changes, mass is mass, always the same

Question 12

What is newtons third law?

Answer 12

for every action there is an equal and opposite reaction

in terms of Force

Question 13

What helps distinguish whether you should you newtons second or third law?

Answer 13

The third law applies to only PAIRs of objects. The acting force and reacting force each act on different objects. Think of billiards