Answer:
now his maximum speed is given as
Explanation:
Total time for which Usain Bolt accelerated is given as
now the velocity after uniform acceleration is given as
now remaining time for which he run for the finish line is given as
now the distance moved by him during uniform acceleration is given as
another distance that he moved for uniform speed is given as
now total distance moved by him is 100 m so we have
now his maximum speed is given as
In this case, the movement is uniformly delayed (the final
rapidity is less than the initial rapidity), therefore, the value of the
acceleration will be negative.
1. The following equation is used:
a = (Vf-Vo)/ t
a: acceleration (m/s2)
Vf: final rapidity (m/s)
Vo: initial rapidity (m/s)
t: time (s)
2. Substituting the values in the equation:
a = (5 m/s- 27 m/s)/6.87 s
3. The car's acceleration is:
a= -3.20 m/ s<span>^2</span>
For this case, the first thing we must do is define a reference system.
Suppose that the positive direction of the reference system is upward.
We have that the sum of forces in the vertical axis is given by:
Fy = Fp - Fg
Substituting values:
Fy = 5500 - 6000
Fy = - 500
The negative sign means that the direction of the force with respect to the defined coordinate system is downward.
Answer:
The net force is:
↓ 500N
<h3>What is Physics?</h3>
Física es un término que proviene del griego physis y que significa “realidad” o “naturaleza” y por eso también podemos definirla como la ciencia que estudia las propiedades del espacio, el tiempo, la materia, la energía y sus interacciones.
<h3>What is the amount?</h3>
It is a measurable property that admits degrees of comparison and represents either a count of the number of elements in a set, or the result of a physical measurement of a magnitude.