Answer:
It increases the time it takes for the person to stop.
Explanation:
Answer: I think that it is False, if its wrong I am sorry.
Explanation:
Answer:
15.065ft
Explanation:
To solve this problem it is necessary to consider the aerodynamic concepts related to the Drag Force.
By definition the drag force is expressed as:
Where
is the density of the flow
V = Velocity
= Drag coefficient
A = Area
For a Car is defined the drag coefficient as 0.3, while the density of air in normal conditions is 1.21kg/m^3
For second Newton's Law the Force is also defined as,
Equating both equations we have:
Integrating
Here,
Replacing:
Answer:
Rate at which energy is being removed by the heat = 89.625 watts
Explanation:
P = (c₁m₁ + c₂m₂)ΔTₓ
Where P = rate at which energy is being removed by the heat, c₁ = specific heat capacity of water, m₁ = mass of water, c₂ = specific heat capacity of aluminium, m₁ = mass of aluminum, ΔTₓ = rate of temperature decrease.
Where c₂ = 900 J/kgK, m₁ = 800 g = 0.8 kg, m₂ = 250 g = 0.25 kg, c₁ = 4200 J/kgK, ΔTₓ = 1.5°C per minute
P =( 4200×0.8 + 900× 0.25)1.5
P = (3360 + 225 ) 1.5
P = (3585 )1.5
P = 5377.5 J/ min.
P = 5377.5/60 = 89.625 watts.
Rate at which energy is being removed by the heat = 89.625 watts