Motion in a straight line Flashcards
1
Q
Displacement in nth second
A
Sn = u + a/2(2n - 1)
2
Q
Area under vt gives
A
displacement
3
Q
Area under vt gives
A
distance
4
Q
Area under at gives
A
change in V
5
Q
at height H, V =
A
√2gH
6
Q
at height H, V & time of fall is independant of
A
mass
7
Q
Time of fall
A
t = √(2H/g)
8
Q
When obj is thrown upwards, a =
A
-g
9
Q
At max H, V =
A
0
10
Q
H(max)
A
u^2/2g
11
Q
Time of flight
A
T = 2t t = time of fall
12
Q
S =
A
αβt^2/2[α+β] where α, β are acc at time t1, t2
13
Q
tanα =
A
Bsinθ/ A + Bcosθ
14
Q
if |A| = |B|, then |R| =
A
2Acosθ/2 = |A+B|
15
Q
if |A| = |B|, then |A-B| =
A
2Asinθ/2
16
Q
Fcosθ =
A
ma
17
Q
At max height Vy =
A
0
18
Q
Eqn of trajectory
A
y = xtanθ - gx^2/2u^2cos^θ
19
Q
Time of flight T =
A
2usinθ/g
20
Q
Max H =
A
u^2sin^2θ/2g
21
Q
Horizontal range R =
A
u^2sin2θ/g
22
Q
R =
A
= 4H/tanθ
= T^2g/2tanθ
23
Q
H =
A
T^2 g/8
24
Q
When θ = 90, R =
A
0, Hmax = u^2/2g
25
When θ = 45, R =
Rmax = u^/g Hmax = Rmax/4
26
change in momentum of projectile
Horizontal momentum remains const
27
F =
mrω^2
