Module#11 Flashcards
Which is the weakest of the fundamental forces? Which is the strongest?
The weakest force is the gravitational force. The strongest is the strong force.
- The gravitational force between two objects (mass1= 10 kg, mass2= 6 kg) and is measured when the objects are 10 cm apart. If the 10 kg mass is replaced with a 20 kg mass and the 6 kg mass is replaced with a 12 kg mass, how does the new gravitational force compared to the first one that was measured?
The new gravitational force, then, is 4 times larger than the old one.
- The gravitational force between two objects (mass1= 10 kg, mass2= 6 kg) and is measured when the objects are 10 cm apart. If the distance between them is increased to 40 cm, how does the new gravitational force compared to the first one that was measured?
The new gravitational force, then, is 16 times smaller than the old one.
- The gravitational force between two objects (mass1= 1 kg, mass2= 2 kg) and is measured with the objects or 12 cm apart. If the 1 kg mass is replaced with a 5 kg mass, the 2 kg mass is replaced with 4 kg mass, and the distance between the object is reduced to 4 cm, how does the new gravitational force compared to the first one that was measured?
The new gravitational force, then is 90 times larger than the old one.
If Venus orbits the sun because the sun exerts a gravitational force on it, what is the equal and opposite force required by Newton’s Third Law of Motion?
The equal and opposite force is the gravitational force that venus exerts on the sun.
In an Olympic event called the “hammer throw,” and athlete Twells a massive ball on the end of a wire. Once he gets the ball twirling very quickly, the athlete releases the wire, allowing the ball to fly straight out into the field. The person who throws the ball the farthest this way is the winner.
A. As the athlete 12 the ball faster and faster, will the wire half to apply more, less, or the same amount of centripetal force?
B. Suppose the athlete starts by gripping the wire close to the ball so the ball sweeps out a small circle. Then, keeping the speed of the ball constant, he allows some of the wire to slip through his hands so the ball suites out a larger and larger circle. Will the wire exert more, less, or the same amount of force as the athlete makes his adjustment?
A. More force
B. Less force
What is, “centrifugal force?”
It is a myth. There is no such force.
List the inner planets and the outer planets.
Inner planets- Mercury, Venus, Earth, and Mars
Outer planets- Jupiter, Uranus, Saturn, and Neptune
List the planets of the solar system from the closest to the sun to the farthest to the sun.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
List the planets that have rings.
Saturn, Uranus, Jupiter, Neptune
Where are most of the asteroids in the solar system?
Between the orbit of Mars and Jupiter.
What causes an asteroid to become a meteor?
Perturbations in its orbit
What are the three parts of a comet? Which of those parts is always present in a comet?
A nucleus, a coma, and a tail. The nucleus is always present.
During what part of a comet’s orbit are all three parts present?
When the comet is close to the sun.
Are all comets’ orbit circular or elliptical?
Comet orbits are elliptical.
