Unit 2 Study Guide for Exam SPS8 27 Oct 11
True/False
Indicate whether the statement is true or false.
____ 1. On the temperature vs time graph, the dependent variable is time
____ 2. On the temperature vs time graph, it takes 5 minutes to reach 0 degrees C.
____ 3. On the temperature vs time graph, the unit of the slope is min/^{o}C
____ 4. Helen uses a force of 200N to push a cart a distance of 20 meters. How much work did she do on the cart?
a.

0.1 J

c.

180 J

b.

10 J

d.

4000 J

____ 5. What is the mechanical advantage of a wedge that requires an input force of 3 N to do 9 N of work?
____ 6. A new runway is being constructed at the HartsfieldJackson Atlanta International Airport. If the smaller planes travel at an average velocity of 50m/s, and it takes 5 seconds for the planes to get to the end of the runway, what is the minimum length that the runway should be?
a.

The runway should be at least 100 meters long.

c.

The runway should be at least 200 meters long.

b.

The runway should be at least 150 meters long.

d.

The runway should be at least 250 meters long.

____ 7. Which one of Newton’s three laws of motion is being illustrated in the drawing below?
a.

Newton’s law of universal gravitation

c.

Newton’s second law of motion, F=ma

b.

Newton’s first law of motion, the law of inertia

d.

Newton’s third law of motion, action = reaction

____ 8. Jupiter is the largest planet in our solar system. An asteroid passing by Earth at a determined distance might not be pulled into our atmosphere, but if the same asteroid were passing by Jupiter at the same distance, it might be pulled into Jupiter’s atmosphere. What is the BEST explanation for this?
a.

Jupiter’s mass is greater than the mass of Earth, and therefore, the gravitational pull of Jupiter is greater.

c.

Earth’s distance from the sun is less than the distance of Jupiter to the sun and therefore, Jupiter has less gravity.

b.

Jupiter’s mass is greater than the mass of Earth, and therefore, the gravitational pull is less than that of Earth.

d.

Earth’s distance from the sun is less than the distance of Jupiter to the sun and therefore, Jupiter has more gravity.

____ 9. A car has a uniformly accelerated motion. I the car started from rest, traveled for 4 seconds and reached a final velocity of 20 meters/second, what was the car’s acceleration?
a.

1 meter/sec^{2}

c.

5 meter/sec^{2}

b.

2 meter/sec^{2}

d.

10 meter/sec^{2}

____ 10. Eddy and Gamby traveled during the holidays to visit their family members in Atlanta. The distance and driving time are shown in the graph that follows.
Which conclusion can be made from the graph?
a.

They stopped often along the way.

c.

There were different drivers at different times during the journey.

b.

They traveled at a fairly constant velocity.

d.

They were driving slowly at first, but their velocity increased every hour.

____ 11. Imagine an object sitting on a frictionless surface. If a 16N force is applied to the object and its acceleration is 2m/s^{2}, what is the mass of the object?
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