torque

If you stood atop a ladder on earth that was as tall as earths radius(so you were twice as far from the earths center) your weight on the ladder would be A. one eighth its normal value B one quarter its normal value C. half of its normal value D. none of the above

One quarter its normal value

A block (m1=50 grams) is sitting on a meter stick at the 10 cm mark. Two identical blocks are at the 75 cm mark on the other side of the fulcrum, which is supporting the meter stick at the 55 cm. What is the mass of each block at the 75 cm mark? The mass of the meter stick is 100 grams.

69g

The moon has a mass of 7.35*10(22)kg and a radius of 1.74*10^6. What is the gravitational force between the moon and an 85 kg astronaut? A. 1.4*10^2 B. 1.4*10^8 C. 2.4 * 10^8 D. None of the above

A. 1.4*10^2

R = .5m M= 20 kg A. 10 Nm B. -10 Nm C. 100 Nm D. -100 Nm

A. 10 Nm

A 560 N person is standing on top of a very tall ladder so that she is one Earth's radius above Earth's surface. How much does she weigh? A. 140 N B. 280 N C. 560 N D. 1120 N

A. 140 N

The gravitational force between two masses is 36N. What is the gravitational force if the distance between them tripled. A. 4.0 N B. 9.0 N C. 18 N D. 27 N

A. 4.0 N

What event will produce the greatest increase in the gravitational force between two masses? A. Doubling the larger of the two masses B. Doubling the distance between the masses C. Reducing the smaller of the two masses by half D. Reducing the distance between the masses by half

A. Doubling the larger of the two masses

The gravitational force between Earth and the moon is A. Reduced by distance B. Independent of distance C. Directly proportional to distance D. the same at all distance

A. Reduced by the distance

A planet has half the mass of the Earth and half the radius. Compared to its weight on Earth, an apple on this planet would weigh A. twice as much B. one fourth as much C. half as much D. the same

A. twice as much

2 Trucks with equal mass are attracted to each other with a gravitational force of 6.7x10^-4 N. The trucks are separated by a distance of 3.0 m. What is the mass of one of thee trucks? A. 5.5 x 10^3 B. 9.5 x 10^3 C. 3.0 x 10^7 D. 9.0 x 10^7

B. 9.5 x 10^3

If the radius of Earth decreased, with no change in mass, your weight would A. Not change B. Increase C. Decrease

B. Increase

If Earth's mass decreased to one-half its original mass with no change in radius, then your weight would A. stay the same B. decreased to one half of your original weight C. decreased to one-quarter of your original weight D. none of the above

B. decreased to one half of your original weight

A very massive object A and a less massive object B move toward each other under the influence of gravity. Which force, if either, is greater? A. The force on B B. The force on A C. Both forces are the same

C. Both forces are the same

When calculating the gravitational force between two extended bodies, you should measure the distance A. From the closest points on each body B. From the most distant points on each body C. From the center of the body D. From the center of one body to the closest point on the other body

C. From the center of the body

If the mass of Earth increased, with no change in radius, your weight would A. Stay the same B. Decreased C. Increased also

C. Increase

An object moves in a circle at a constant speed. Which of the following is NOT true of the object? A. Its centripetal acceleration points towards the center of the circle B. Its tangential speed is constant C. Its velocity is constant D. A centripetal force acts on the object

C. Its velocity is constant

The force of gravity on you is greatest when you are standing A. Just below Earth's surface B. Just above Earth's surface C. on Earth's surface

C. On Earth's surface

The world universal in Newton's law of universal gravitational means A. The amount of gravitational force is the same for all object B. The acceleration caused by gravity is the same for all objects in the universe C. The force of gravity acts between ALL objects not just between the Earth and an object but also between two people.

C. The force of gravity acts between ALL objects not just between the Earth and an object but also between two people.

Two objects move toward each other because of gravitational attraction. As the objects get closer and closer, the force between them A. remains constant B. decreases C. increases

C. increases

Suppose the gravitational force between two spheres is 30 N. If the magnitude of each mass doubles, what is the force between the masses? A. 8N B. 15 N C. 60 N D. 120 N

D. 120 N

Suppose the gravitational force between two massive spheres is 100 N. If the distance between the spheres is doubled, what is the force between the masses. A. 400 N B. 200 N C. 50 N D. 25 N

D. 25 N

Two small masses that are 10.0 cm apart attract each other with a force of 10.0 N. When they are 5.0 cm apart, these masses will attract each other with what force? A. 5.0 N B. 2.5 N C. 20.0 N D. 40.0 N

D. 40.0 N

Which Newton's law best explains why water stays in the bucket that is whirled around in a vertical path A. 1st B. 2nd C. 3rd D. 4th

D. 4th

A car traveling at 15 m/s on a flat surface turns in a circle with a radius of 25 meters. What is the centripetal acceleration of the car. A. 2.4x10^-2 m/s^2 B. .60 m/s^2 C. zero D. 9.0 m/s^2

D. 9.0 m/s^2

The gravitational force between two massive spheres A. Is always an attraction B. Depended on how massive they are C. Depends inversely on the square of the distance between them D. All of the above

D. All of the above