further mechanics Flashcards
1
Q
what is true about momentum when the line of centres is known?
A
no momentum change perpendicular to line of centres
2
Q
what is the equation for power of a moving vehicle?
A
P = Fv
where f is driving force
3
Q
what is the equation for force on a string or spring?
A
F= λx/l
4
Q
what is the equation for work done on a string or spring?
A
E=λx^2 / 2l
5
Q
what does λ represent?
A
modulus of elasticity
6
Q
what is the equation for Newton’s law of restitution?
A
v=eu
where v and u are speed of separation
7
Q
what does e=0 and e=1 mean?
A
e=0 means particles move off at the same speed
e=1 means all energy is transferred (incoming and outgoing vel are same)
8
Q
A
