Question

Hola tengo un taller de física y nose como resolver este pregunta

Answer 1

a) 0.26 h

b) 71.4 km

Explanation:

a)

In order to solve the problem, we have to know what is the final velocity of the car.

Here, we assume that the final velocity reached by the car is

$v=300 km/h$

Therefore, we can find the time taken by the car to reach this velocity by using the suvat equation:

$v=u+at$

where:

u = 250 km/h is the initial velocity

$a=190 km/h^2$ is the acceleration of the car

v = 300 km/h is the final velocity

t is the time

Solving for t, we find:

$t=\frac{v-u}{a}=\frac{300-250}{190}=0.26 h$

b)

In order to find the distance covered by the car, we can use the following suvat equation:

$s=ut+\frac{1}{2}at^2$

where:

s is the distance covered

u is the initial velocity

a is the acceleration

t is the time

For the car in this problem, we have:

u = 250 km/h

t = 0.26 h (calculated in part a)

$a=190 km/h^2$

Therefore, the distance covered is

$s=(250)(0.26)+\frac{1}{2}(190)(0.26)^2=71.4 km$