Compared to Earth's gravitational force on the space shuttle when in orbit, the force on a shuttle astronaut is: a) the same because both are orbiting at the same speed.
b) less because the astronaut has less mass than the shuttle.
c) more because the shuttle was built to orbit, but the astronaut was made to be on Earth.
d) the same both are zero because there is no gravity in space.
e) less because the shuttle pulls him around in orbit.

Air flows upward in the wick of a lantern because of the liquid property called

The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)