Exam questions Flashcards
State the two conditions necessary for the helicopter to remain in equilibrium.
1) 0 resultant force
2) 0 net force
Explain, in terms of forces, the changes in motion which occur from when the parachutist
leaves the hot-air balloon until point A. [3]
1) Acceleration due to resultant force
2) As air resistance increase and velocity increase
3) Constant speed when air resistance = weight. (Terminal velocity)
As the student catches the ball, she moves her hands backwards.
Explain the effect of this action on the student’s hands.
The longer the time means the smaller the force so hand doesnt hurt as much
Unit for pressure
Pa
Absolute 0
-273c
0K
Explain what is meant by the term absolute zero. Refer to particles in your answer. [2]
1) Particles have LEAST energy
2) Lowest possible temperature
Pressure and volume formula (2)
P1V1=P2V2
Methods of heat transfer for 2 glass panels with air space between
Conduction and convection
P-waves
Longitudinal
S-wave
Transverse
Calculate the speed of light in the oil R=1.47
s=c/n
s=speed of light in different substance
c=speed of light
n= refractive index
Refractive index
Determines how fast light will travel through another medium
Define magnetic field
Where poles experience a force
Define electric field
Where charged particles experience a force
Flow of electron in physics
Electrons flow from Negative to Positive
