The breaking distance consists of two parts. The first part is the first 0.5 seconds were no breaking occurs. Given values: t time, v₀ initial velocity:
x₁ = v₀*t
The second part occurs after t = 0,5s with the given acceleration: a = - 12 m/s²
were the final velocity is zero, v = 0 and the initial velocity v₀= 16m/s:
v = a*t + v₀ = 0 => v₀ = -a*t => t = v₀/-a
x₂ = 0.5*a*t² = 0.5*v°²/a
The total breaking distance is the sum of the two parts:
x = x₁ + x₂ = v₀* t + 0.5 * v₀² / a = 16 * 0.5 + 0.5 * 16² / 12 = 8 + 10,7 = 18,7
You can use this result to calculate the remaining distance. You can use the last equation to calculate the maximum speed you could have to avoid a collision.
Use x = 39m and solve for v₀.
Answer:
Point 2.
Explanation:
Potential energy is simply defined as the energy stored in an object due to its position. It is can be represented mathematically by:
P.E = mgh
Where:
P.E is the potential energy.
m is the mass of the object.
g is acceleration due to gravity.
h is the height to which the object is located.
From the above equation, we can thus say that potential energy depends on the height of the object since the mass of the object is always constant i.e as the height of the object increase, the potential energy also increases and as the height of the object decrease, the potential energy also decreases.
Now, considering the diagram in the question given, we can see that point 2 is the lowest height to which the rider is located. At this point i.e point 2, the rider will have the least potential energy.
Answer:
The answer to your question is below
Explanation:
T = °K
Kinetic energy
Temperature is the measure of the kinetic energy of molecules, the higher the temperature the higher the kinetic energy.
When the temperature is 0°K the molecules will not move and the kinetic energy will be zero.
If the temperature is 373°K the molecules will move fast and the kinetic energy will also be high.
My answer here would be D)
