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Asteroids move through space for billions of years. What keeps them moving? 68% Results for ICA on January 7, 2010, aft...

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Asteroids move through space for billions of years. What keeps them moving? 68%

Results for ICA on January 7, 2010, afternoon class Answers circled in green one clarification typed in

1. Their natural motion 2. Their violent motion 3. Continued force applied to asteroid 4. Inertia 5. Gravity

When the mass of an object is compared to its volume, the concept is 1. 2. 3. 4.

mass. weight. volume. density.

76%

20% 14% 9%

9%

4%

0%

0% 1

mass. weight. density. All of the above.

3

55%

30%

14%

1. at rest. 2. moving with constant velocity. 3. having no acceleration. 4. all of the above

9%

2

3

0% 4

An object weighs 30 N on Earth. A second object weighs 30 N on the Moon. Which has the greater mass? 1. the one on Earth 2. the one on the Moon 3. They have the same mass. 4. not enough information to say

53%

20% 16% 11%

1

2

3

acting on the same line

4 N. 20 N. Both of the above. Neither of the above.

• Explanation: When parallel, 12 N + 8 N = 20 N, or 12 N – 8 N = 4 N.

36%

Less More The same You cannot tell without weighing them 5. It depends on what unit system you use

2

3

4

4

16% 2% 1

2%

2

3

0%

4

5

Distance traveled is equal to average speed multiplied by distance. time. acceleration. instantaneous speed.

93%

16%

5% 2%

0% 1

3

1. 2. 3. 4.

1. 2. 3. 4.

43%

2

Compared with the mass of a certain object on Earth, the mass of the same object on the Moon 80% is

4

A pair of parallel forces of 8 N and 12 N can have a resultant of 1. 2. 3. 4.

1

5

47%

44%

2% 1

4

An object in mechanical equilibrium is an object

The force due to gravity on a body is the body’s 1. 2. 3. 4.

2

1

2

3

4

1

2

3

4% 4

1