Answer: 45.3°
Explanation:
Given,
Length of ladder = l
Weight of ladder = w
Coefficient of friction = μs = 0.495
Smallest angle the ladder makes = θ
If we assume the forces in the vertical direction to be N1, and the forces in the horizontal direction to be N2, then,
N1 = mg and
N2 = μmg
Moment at a point A in the clockwise direction is
N2 Lsinθ - mg.(L/2).cosθ = 0
μmgLsinθ - mg.(L/2).cosθ = 0
μmgLsinθ = mg.(L/2).cosθ
μsinθ = cosθ/2
sin θ / cos θ = 1 / 2μ
Tan θ = 1 / 2μ
Substituting the value of μ = 0.495, we have
Tan θ = 1 / 2 * 0.495
Tan θ = 1 / 0.99
Tan θ = 1.01
θ = tan^-1(1.01)
θ = 45.3°
You multiply your average speed with the time for which you have been traveling
Answer:
A
Explanation:
The distance between the water molecules increases. As temperature increases the water molecules gain energy and move more rapidly and this results in the molecules getting further apart
<span>when you say a=4.02 i am going to acceleration in m/s^2.
If the acceleration is 4.02 then you take the integral to find the speed.
speed=4.02 t where t is time in seconds.
[4.02(0)+4.02(3.11)]/2=6.2511
[4.02(3.11)+4.02(6.22)]/2=18.7533</span>
