Physics, 28.10.2020 17:50, angeljaylyn123

The image shown is an illustration of Kepler's second law.

Which conclusion is best supported by the image?

O The gravitational force at W is less than the
gravitational force at Y.

The time needed to travel from W to X is the same as
the time needed to travel from Y to Z.

O The gravitational force at W is the same as the
gravitational force at Y.

The time needed to travel from W to X is greater than
the time needed to travel from Y to Z.

Answers: 1

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Answers

answered: Guest

3.2x10^7

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

+15-35=-20

going in opposite directions

answered: Guest

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

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Do you know the correct answer?

The image shown is an illustration of Kepler's second law.

Which conclusion is best sup...