1d collisions head on collisions sticking together
ANSWER : mv - mv = collective mass x v
1d collisions in the same direction not sticking together
... [Show More] ANSWER : mv + mv = mv + mv
1d collisions in the same direction sticking together
ANSWER : mv + mv = collective mass x v
1d explosions
ANSWER : mv + 0 = collective mass x v
1d recoil
ANSWER : 0 = mv + mv
Gun velocity will be negative as it is going back
2d collisions
ANSWER : Total momentum in vertical component
Total momentum in horizontal component
Use momentums to find resultant vector
Divide by combined mass to find velocity
Use SOHCAHTOA to find angle of velocity
360 degrees =
ANSWER : 2π radians
Absolute uncertainty
ANSWER : expresses the margin of uncertainty associated with a measurement e.g. ±0.02
Absorption of gamma through lead Geiger-Muller
ANSWER : Measures count so divide by time to get count rate per second
Large periods of time reduce count rate
Absorption of gamma through lead method
ANSWER : - change thickness of Lead between a gamma emitter and a Geiger Muller tube
- plot a log graph of counts per second vs fitness
Absorption of gamma through lead risk
ANSWER : Limit radiation and contain contamination
Do this by keeping distance, line of sight and time as doubling distance will quarter the intensity of the
radiation
Absorption of gamma through lead uncertainty
ANSWER : Radiation is random and therefore uncertainty is random
Therefore increasing time increases accuracy as would doing repeats of thickness and diameter
measuring
Accuracy
ANSWER : A description of how close a measurement is to the true value of the quantity measured.
An emf is induced
ANSWER : When there is relative movement between a magnet and a coil
An object being hit off the ground at an angle horizontal distance travelled
ANSWER : Work out horizontal component of inital velocity
Use d = horizontal velocity x time
An object being hit off the ground at an angle time in air
ANSWER : Consider vertical velocity = 0
Consider vertical component of initial launch
using SOHCAHTOA
Know acceleration is negative and dependant on the planet
Use suvant to find t
Double it as this motion is parabolic and thus half of the time
An object thrown off a cliff distance it lands from the foot of the cliff
ANSWER : Horizontal distance = horizontal velocity x time of flight
Horizontal velocity is given
Time may be given or worked out earlier using suvat
An object thrown off a cliff magnitude of final velocity
ANSWER : Vertical Velocity = u + at
Horizontal Velocity is given in the question
Use Pythagoras to find resultant
An object thrown off a cliff time taken to reach ground
ANSWER : Use suvat remembering u is 0
Angle in radians
ANSWER : length of arc (s) / radius (r)
Angular speed
ANSWER : Angle turned/ time taken
Angular speed and time period/frequency equations [Show Less]