our dynamic universe Flashcards
1
Q
what does the area under a velocity-time graph equal?
A
the distance travelled
2
Q
effects of friction on a moving object
A
diminishes some or all of the driving force acting on an object
3
Q
terminal velocity
A
occurs when an object is falling and downwards force becomes equal to upwards force (air resistance)
- object will travel at constant velocity
4
Q
horizontal component of force
A
= Fcos0
5
Q
vertical component of force
A
= Fsin0
6
Q
solving systems of masses problems
A
- draw free body diagram and label all the forces
- find unbalanced force on whole system
- use F = ma to find acceleration of whole system
- split the system up into ‘bits’ and focus on the bit you’re interested in
7
Q
component of weight perpendicular to slope
A
= mgcos0
8
Q
component of weight parallel to slope
A
= mgsin0
9
Q
what is an elastic collision?
A
total kinetic energy is conserved
10
Q
what is an inelastic collision?
A
total kinetic energy not conserved
