Physics, 20.09.2020 14:01, kahliey

The trip takes approximately 2 hours and covers approximately 1900 km. Which of the following best describes the velocity of the jets flight? 950 km/h southwest
950 km/h
3800 km/h southwest
3800 km/h

Answers: 2

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answered: nanagardiner08

The answer is 950km/h

Explanation

step one:

In this exercise, we are expected to solve for the velocity that best describes the filght of jets given the following data

step two

data

time taken t= 2 hours

distance coverd= 1900km

we know that speed= distance/time taken

i.e s=d/t

step three:

substituting our into the expression we can solve for s

s= 1900/2

s= 950km/h

Hence the velocity that best describes the flight is 950km/h

answered: Guest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

answered: Guest

The answer is the potential energy of the bob at position b is 1.47 joules.if the maximum height of the bob is 0.45 meters when it swings back,1.323 joules of energy was transformed to thermal energy.hope this

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The trip takes approximately 2 hours and covers approximately 1900 km. Which of the following best d...