Physics and Astronomy portion

You may use g = 10 m/s2 for the acceleration of gravity.

1. Be able to fill in quantities in the chain of mechanical quantities.

2. A ball is thrown straight upward with an initial velocity of 40 m/s.
After two seconds of flight, it will have a velocity of about

a. 0 m/s

b. 60 m/s
**c. 20 m/s**

d. can't be determined

and an acceleration of about

a. 10 m/s2 upward
**b. 10 m/s2 downward**

c. zero, weightless condition

d. less than 10 m/s2 because it has slowed down

3. A Mack truck and a Honda Civic traveling at the same speed
collide head-on. The impact force is greatest on the

a. Honda Civic **c. ...is the same for both**

b. Mack truck

4. A Mack truck and a Honda Civic traveling at the same speed have a
head-on collision. The vehicle to undergo the greatest acceleration will
be the
**a. Honda Civic ** c. both the same

b. Mack truck

5. A ball rolls down an incline from rest to a distance of 4 meters
in 2 seconds. The average velocity is
**a. 2 m/s**

b. 0.5 m/s

c. 1/8 m/s

d. 8 m/s

6. If the acceleration is constant, the final velocity at the end of
the roll above would be expected to be
**a. 4 m/s**

b. 1 m/s

c. 16 m/s

d. 2 m/s

7. A net force of 40 newtons acts on a 2 kg block and moves it 4 meters
in the direction of the force. The work done on the block is

a. 80 joules
**b. 160 joules**

c. 320 joules

d. 1600 joules

8. A car crashes into a barrier and is brought to a sudden stop. To
minimize the impact force on the car

a. the car should be build solidly so that it does not collapse
**b. the car should be build in such a way to give maximum collapse on
impact.**

c. nonsense! the impact force just depends on how fast you were going.

because
**a. increasing the distance traveled during an impact decreases the
force of impact.**

b. increasing the distance traveled during an impact increases the
force of impact.

c. the force of impact is independent of the distance traveled during
impact.

9. A woman on the surface of the Earth has a mass of 50 kilograms and
a weight of 490 newtons. If the woman were floating freely inside a space
habitat far away from Earth, she would have

a. less weight and more mass
**b. less weight and the same mass.**

c. less weight and less mass

d. more weight and less mass.

e. none of these.

10. If you mass a rock in air and find its mass to be 45 grams, and then mass it while submerged in water (density 1 gm/cm3) and find its apparent mass to be 30 grams, then the density of the rock is

a. 1.5 gm/cm3
**b. 3 gm/cm3**

c. 2 gm/cm3

d. can't be determined with this data

11. For an elliptical planetary orbit, the sun is located at

a. the center of the ellipse.
**b. one focus of the ellipse.**

c. the perigee point of the ellipse.

d. the apogee point on the ellipse.

12. Newton's Second Law of Motion connected the action of a "force" with a resulting "acceleration". What property of an object influences how large that acceleration will be?

a. weight

b. volume

c. speed
**d. mass**

e. density

13. Johannes Kepler developed his laws of planetary motion bases in the motion of which planet?

a. Venus
**b. Mars**

c. Jupiter

d. Neptune

14. In which constellation would you find mars tonight?

a. Sagittarius

b. Antares
**c. Scorpius**

d. Lyra

15. In general planets appear to move in which direction among the stars?

a. north

b. south

c. east

d. west

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