Q:
# What does Kepler's second law imply?

A:

Kepler's second law implies that the closer a planet is to its star, the faster the planet travels. This law is related to conservation of angular momentum. The law is important because the planets' orbits around stars are not circular, so planets are closer to their stars at certain points.

Kepler's second law assumes that if a line is drawn between a star and its planet, for any set time period, that line sweeps out the same area each period, no matter where in orbit the planet is at the time.

For example, if the time period is 10 days, the line between the planet and the star sweeps out equal areas every 10 days. This is possible because when the planet is closer to its star, it moves faster, and when it is further away from its star, it moves slower. At aphelion, the point in a planet's orbit furthest away from the star, the planet moves the slowest. At perihelion, the planet is closest to its star and moves the fastest. This is because of the planet's conservation of angular momentum.

Angular momentum is directly proportional to an object's moment of inertia and angular velocity. When a planet's distance from its star increases, its moment of inertia increases. For its angular momentum to remain the same, the planet's angular velocity has to decrease.

Learn More-
Q:
## What is Isaac Newton's theory of gravity?

A:

Full Answer >**Isaac Newton's theory of gravity states that every particle in the universe attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.**The law is represented as: F=G (m1m2)/R.Filed Under: -
Q:
## What simple machines make up a pair of scissors?

A:Scissors are composed of two different types of simple machines: wedge and lever. The scissors' blades are sharpened into wedges, and the arms that are squeezed together are levers.

Full Answer >Filed Under: -
Q:
## How is a toilet paper dispenser a wheel and axle?

A:

Full Answer >**A toilet paper dispenser is an example of a wheel and axle.**The rod that supports the roll of toilet paper serves as the axle, and the toilet paper roll serves as the wheel. Like all wheel and axle machines, the toilet paper rotates concentrically around the cylindrical holder, which is fastened in place.Filed Under: -
Q:
## What is the formula for acceleration?

A:

Full Answer >**The formula for acceleration is given as a = (v**The SI unit for acceleration is meters per second squared (m/s_{2}- v_{1}) / (t_{2}- t_{1}), where "a" denotes the acceleration, "v_{2}" indicates the final velocity, "v_{1}" represents the initial velocity and "t_{2}- t_{1}" is the time interval between the final and initial velocities.^{2}), while the British imperial unit is feet per second squared (ft/s^{2}).Filed Under: