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Ch1 HW2 f10 (Homework)
Ashlyn Baum
Physics 303K, section B, Fall 2010
Instructor: Jim Chelikowsky
Current Score :
22 / 23
Due :
Wednesday, September 1, 2010 11:30 PM CDT
1.
1/1 points
Question: MI3 1.3.X.004
A spaceship far from all other objects uses its impulse power system to attain a speed of 10
4
m/s. The crew then shuts off the power. According to Newton's first law, what will happen to
the motion of the spaceship from then on? (Select all that apply.)
Solution or Explanation
Because the spaceship is far from all other objects, its interactions are minimal. According to
Newton's first law of motion, "An object moves in a straight line and at constant speed except
to the extent that it interacts with other objects." Since there are negligible interactions, the
spaceship will move in a straight line, and its speed will not change.
2.
1/1 points
Question: MI3 1.4.X.005
You slide a coin across the floor, and observe that it slows down and eventually stops. A
sensitive thermometer shows that its temperature increased. What can we conclude? (Select
all that apply.)
The due date for this assignment is past.
Your work can be viewed below, but no changes can be made.
The speed of the spaceship will not change.
The spaceship will stop suddenly.
The spaceship will gradually slow down.
The spaceship will move in a straight line.
The spaceship will enter a circular orbit.
The spaceship will travel on a curving path.
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 Fall '10
 Chelikowsky
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