Newton's Laws,Forces,Gravity Flashcards
1
Q
Newton’s Three Laws?
A
1) Law of inertia
2) Fnet=ma
3) Action-Reaction
2
Q
Fn=?
Fsf=?
Fkf=?
Inclined plane(Fn,Ff)?
A
Fn=Fw=mg
Fsf=Fn x μs
Fkf=Fn x μk
Fn=mgcosθ
Ff=mgsinθ
3
Q
Pulley(1)?
A
a=((m2-m1)/(m2+m1))*g
4
Q
Pulley(with table)?
A
mg=(m+M)a
5
Q
On a frictionless table?
A
No weight and no friction considered
6
Q
Fg=?
A
Fg=G(m1m2)/r^2 where G is 6.67x10^-11
7
Q
g=?(surface gravity at a point)
Unit=?
A
g=G(m/r^2)
m/s^2
8
Q
Kepler’s Laws?
A
1) Planets orbit in ellipse with sun at a foci
2) A line drawn from planet to sun sweeps out same areas during equal time intervals
3) T^2/a^3=constant
9
Q
Ug=?
A
Ug=mgh or G(m1m2)/r
10
Q
Vorbit=?
A
Vorbit=sqrt(GM/r)
