SAT High School

Una tractomula se desplaza con rapidez de 69 km/h. Cuando el conductor ve una vaca atravesada en medio de la carretera, acciona los frenos y se detiene 4 s después. Si la vaca estaba a 25 m de la tractomula cuando el conductor pisó el freno. ¿atropelló la vaca? Justifique su respuesta.

Answers

Answer 1

Responder:

El remolque del tractor no atropellará a la vaca.

Explicación:

Dado lo siguiente:

Velocidad del tractor remolque: 69 km / h

Tiempo necesario para detenerse después de aplicar los frenos = 4 segundos

Distancia de vacas desde el remolque del tractor = 25 metros

Por lo tanto, la distancia recorrida por el remolque del tractor después de aplicar los frenos:

Velocidad del tractor remolque / Tiempo

69 km / h = (69 * 1000) m / 3600s = 69000m / 3600s = 19.17m / s

(19,17 m / s ÷ 4 s) = 4,8 m

Como la distancia de la vaca está más lejos (25 m), el remolque del tractor no pasará por encima de las vacas

Related Questions

y=x2+x-2
x+y=1
If(x,y)is a solution of the system of equtions abpve which of the following is possible value of xy?

Answers

Answer:

The equations are :

y=x²+x-2

x+y=1⇒ y= 1-x

multiply(y=1-x) by -1 then add it to y= x²+x-2

you get : x²+x-2+x-1=0⇒ x²+2x-3 = 0

let Δ be the dicriminat of this equation :

a= 1b= 2c= -3

Δ = 2²-4*1*(-3)= 16

so this equation has two solutions

x= (-2-4)/2 = -3  or  x=(-2+4)/2 = 1

then :

if x= -3 y= 4   y= 1+3 if x = 1 y= 0

now the possible solutions are (-3,4) and (1,0)

the possible values of xy are :

-12 : -3*4= -120 : -3*0= 0 4 : 4*1= 4 0 : 1*0=0

so xy could be : 0 or 4 or -12

A 10 kg ball is traveling at the same speed as a 1 kg ball. Compared to the 10 kg ball, the 1 kg ball has A) the same momentum B) 1/100 the momentum C) ten times the momentum D) 1/10 the momentum

Answers

Answer:

I think it is D

Explanation:

Answer:

Answer B I think

Explanation:

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