Newton Discovered
What is that gravity is universal?
Field that surrounds earth where a mass will experience a gravitational force.
What is the gravitational field?
A projectile moving fast enough to fall continually around Earth rather than into it.
What is Earth's satellite?
What is rotation?
What is Kepler's second law?
_________ is the time it take to make one revolution, but ___________ is how often an object completes a revolution.
What is period & frequency?
Everything is attracted to everything else.
What is the law of Universal Gravitation.
As you move further away from the surface of Earth, the gravitational field ________
What is decreases?
8,000 m/s or 8 km/s
What is the orbital speed for close orbit around Earth?
When an object moves around and external axis.
What is a revolution?
The closer a planet is to the sun, the _______ the period of its motion.
What is shorter?
When an object experiences uniform circular motion, the direction of the net force is
What is towards the center of the circular path.
If the mass of one object is doubled the gravitational force will
What is double.
zero
What is the gravitational field at the center of a planet?
Oval shaped path
What is an ellipse?
The closer an object is to the center of a rotating object the ________ the linear velocity will be.
What is smaller?
The path of each planet around the sun is an ellipse with the sun at on focus.
What is Kepler's first law?
Consider a particle moving with constant speed such that its acceleration of constant magnitude is always perpendicular to its velocity. Describe this particles motion.
What is moving in a circle?
Will reduce by 1/9.
Towards the center
What is the direction of the gravitational field?
Foci
What is a revolution?
Which planet, Jupiter or Saturn, has the longer period?
What is Saturn?
A car goes around a curve of radius r and at a constant speed v. Then it goes around the same curve at half the original speed. What is the centripetal force on the car as it goes around the curve for the second time, compared to the first time?
What is 1/4 as big.
6.67 x 10-11 Nm2/kg2
What is the gravitational constant?
Your weight is zero inside the cavity of earth because
In elliptical orbits the speed of satellites _____
What is varies?
Horses that move with the fastest angular speed on a merry-go-round are located
What is anywhere because they all move at the same speed.
The square of the orbital period of a planet is directly proportional to the cube of the average distance of the planet from the sun.
What is Kepler's third law?
As you go over a hill in your car, your apparent weight will be
What is be less than than your normal weight.