IDS 2403 Chpt 4 HW
Passengers in a high-flying jumbo jet feel their normal weight in flight, whereas passengers in an orbiting space vehicle do not because they are
without support forces
Your weight is defined to be the force
you exert against a supporting surface.
A bullet fired horizontally hits the ground in 0.5 s. If it had been fired with twice the velocity it would have hit the ground in
0.5 s.
The force of gravity on a satellite in circular orbit doesn't change its speed because the force is
perpendicular to its direction of motion.
This chapter states a link between Newton's Universal Law of Gravity and
the U.S. Constitution.
Escape speed for a rocket is less from
the moon
The speeds of the planets about the Sun depend on
their distances from the sun
A "weightless" astronaut in an orbiting space vehicle is
without a support force.
Why does the gravity in the Space Shuttle compare with the gravity on Earth the way it does?
The Space Shuttle and the surface of the Earth are about the same distance from the center of the Earth.
Why do the astronauts in the Space Shuttle float around?
The Space Shuttle is in free fall, so the shuttle and the astronauts inside it are continuously falling toward the Earth. They thus experience apparent weightlessness.
Which ball (if either) has the greatest speed at the moment of impact?
The ball thrown horizontally
How does the gravity in the Space Shuttle compare with the gravity on Earth's surface?
The gravity in the Space Shuttle is approximately equal to the gravity on the surface of the Earth.
If your mass doubles, your weight
also doubles
The following five diagrams show pairs of astronomical objects that are all separated by the same distance d. Assume the asteroids are all identical and relatively small, just a few kilometers across. Considering only the two objects shown in each pair, rank the strength, from strongest to weakest, of the gravitational force acting on the asteroid on the left.
asteroid -> sun asteroid -> earth asteroid -> moon asteroid -> asteroid asteroid -> hydrogen atom
Acceleration is greatest for a satellite in elliptical orbit when it is
closest to Earth.
As a bowling ball that rolls off the edge of a table falls, its vertical component of motion
increases
Two objects move toward each other due to gravity. As the objects get closer and closer, the acceleration of each
increases
