Name: 

A TV ad for an automobile showed the car going around a vertical (almost) loop on a vertical loop track. If the diameter of the loop was 36 m, the speed of the car measured in km/h must have been (to prevent falling at the top of the loop) at least:

An ice skater executes a figure which includes a circle of 4.0 m diameter. If the static coefficient of friction between the skate and the ice is 0.10 during the turn, then the skater's speed cannot exceed:

A cylindrical space station in orbit around earth is to generate artificial gravity for the crew by rotating the cylinder about its axis. If the inside diameter of the cylinder is 50 m, the speed of rotation (rpm) necessary to produce earth's gravity is:

A person weights 725.2 N on a scale at the equator. This person then travels to Salem, Oregon (45° latitude) and weighs again. If the earth is assumed to be a perfect sphere with gravitational acceleration near the surface equal to 9.8 m/s², radius m and rotates once every 24 hours, the person would weigh:

A plumb bob of 150 g mass is swung in a circular path from a 1.50 m cord. If the diameter of the circle is 60 cm, the tension in the cord is:

The gravitational force of the earth of mass kg and radius 6,370 km on a 5,000 kg satellite 630 km above the ocean is (gravitational constant is ):

Considering the gravitational force of the earth of mass and radius 6,370 km on a 5,000 kg satellite 630 km above the ocean (). The acceleration of gravity at sea level on a spherical earth is:

For a spherical earth, the speed of an orbiting satellite in a circular orbit 630 km above the ocean is:

The moon has a radius of km and a mass of kg. The acceleration of gravity on the moon is:

Two 80 kg astronauts are in a "weightless" condition in space. If they are 10 m apart, their gravitational attraction is:

The centripetal force on a 500 kg satellite in a stable circular orbit at an altitude of 230 km above the ocean is:

A satellite in stable orbit 230 km above the ocean has a period of:

The period of the earth's rotation on its axis, relative to the fixed heavens, is seconds. The altitude of a geosynchronous satellite above the ocean must be:

If the earth's rotation on its axis has a period of seconds, relative to the heavens, the speed of a geosynchronous satellite in orbit is:

The mass of the moon is kg and its center to center distance from the earth is m. The earth has a mass of kg and its radius is m. The gravitational acceleration of the moon on the ocean when it is directly above the ocean is:

What is the magnitude of the net gravitational force on the moon () due to the gravitational attraction of the earth () and the sun () when they are at a right angle (90°) to each other.

What is the force of gravity acting on a 2,000 kg satellite orbiting the earth in the orbit of radius equal to two earth radii (radius of the earth is approximately 6,380 km).

In Jules Verne's story titled "From the Earth to the Moon" three men were shot to the moon in a shell fired bya giant cannon from a location in Florida. What muzzle velocity is needed to allow the shell to escape from earth? Neglect all air-resistance effects as well as the effects of the gravity of the moon, sun, etc. ()

A weather satellite is in a circular orbit 300 km above the surface of the earth (). The period of satellite orbit is