Chapter 9

What is the magnitude of Earth's gravitational force on a 1-kg body at Earth's surface? What is the magnitude of Earth's gravitational force on a 1-kg body at Earth's surface? 1 kg 10 N 6.67 × 10 -11 N 6.67 × 10 -11 kg

10 N

The concept of force is fundamental to The concept of force is fundamental to Einstein's theory of gravitation. Newton's theory of gravitation. both of these neither of these

Newton's theory of gravitation.

What is the force of gravity on a 500-N woman standing on Earth's surface? What is the force of gravity on a 500-N woman standing on Earth's surface? 250 N 50 N 500 N 5000 N none of the above

500 N

Why is a black hole invisible? Why is a black hole invisible? A black hole is surrounded by an opaque cloud of dust. The escape velocity of the black hole is greater than the speed of light. A black hole is made of matter that absorbs all wavelengths of light. A black hole is a black dwarf star.

The escape velocity of the black hole is greater than the speed of light.

According to Newton, the greater the masses of interacting objects, the According to Newton, the greater the masses of interacting objects, the greater the force between them by the square of the masses. less the gravitational force between them. greater the gravitational force between them.

greater the gravitational force between them.

If Earth shrank, but there was no change in its mass, then what would happen to your weight at the surface? If Earth shrank, but there was no change in its mass, then what would happen to your weight at the surface? It would increase. It would decrease at first and then increase. It would decrease. It would stay the same.

it would increase

According to Newton, when the distance between two interacting objects doubles, the gravitational force is According to Newton, when the distance between two interacting objects doubles, the gravitational force is the same. one-quarter. twice as much. half. four times as much

one-quarter.

Tidal forces in general are the result of Tidal forces in general are the result of the inverse-square law. unequal forces acting on different parts of a body. unequal fluid flow. two or more sources of gravitation. a combination of any kind of forces acting on a body.

unequal forces acting on different parts of a body