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Physical Science force and motion Blizzard Bag 2014 - 2015
1.
Which explanation describes the forces involved for a person to walk down the sidewalk?
A. The person's feet push backward on the sidewalk; the sidewalk pushes backward
on the person.
B. The person's feet push forward on the sidewalk; the sidewalk does not push on the
person.
C. The person's feet push backward on the sidewalk; the sidewalk pushes forward on
the person.
D. The person's feet push forward on the sidewalk; the sidewalk pushes forward on
the person.
2.
If two magnets were held in the position shown above, what would happen?
A. The magnets would neither repel nor attract each other.
B. The magnets would simultaneously repel and attract each other.
C. The magnets would attract each other.
D. The magnets would repel each other.
3. Kent is twirling a ball attached to a string in a clockwise direction. If Kent lets go of the string,
which of the following describes the motion that the ball will take if there are no gravitational
forces influencing the motion of the ball?
A. It will curve up and then fall to the ground.
B. It will curve down and then turn back up.
C. It will continue in a straight line.
D. It will fall straight to the ground.
4. John and Daniel are playing tug-of-war together. John is exerting 10 N of force. Daniel is
exerting 12 N of force. What is their net force?
A. 2 N in Daniel's direction
B. 2 N in John's direction
C. 22 N in Daniel's direction
D. 22 N in John's direction
5. Bryan and Alyssa are playing tug-of-war against Daniel and Maria. Bryan and Alyssa are
exerting a combined force of 10 N. Daniel and Maria are exerting 12 N of force.
What type of force has resulted?
A. an unbalanced force moving everyone in Bryan and Alyssa's direction
B. a balanced force leaving everyone in the same place
C. a balanced force moving everyone in Daniel and Maria's direction
D. an unbalanced force moving everyone in Daniel and Maria's direction
6. Suppose a bicycle was coasting on a level surface, and there was no friction. What would
happen to the bicycle's speed?
A. The speed would decrease but you would never stop.
B. The speed would decrease until you finally came to a stop.
C. The speed would increase since there is no friction.
D. The speed would remain constant.
7. Which of the following is true about magnetic poles?
A. Magnetic poles attract all other magnetic poles.
B. Opposite poles repel each other, while like poles attract each other.
C. Opposite poles attract each other, while like poles repel each other.
D. Magnetic poles repel all other magnetic poles.
8. From a stopped position, a car starts to accelerate at 3 m/sec2. Which graph below best
represents the motion of the car?
A. Z
B. W
C. X
D. Y
9. Neil Armstrong weighed more on Earth than he did on the moon because the Earth has a
greater
A. density.
B. atmosphere.
C. gravitational force.
D. electromagnetic field.
10. Which of the following is a unit of acceleration?
A. kg-m/sec2
B. kg-m/sec
C. m/sec2
D. m/sec
11. Two balls are dropped at the same time from the top of a ladder. The balls are of equal size,
but Ball A has more mass than Ball B. Which of the following best describes the time it would
take the two balls to hit the ground?
(Note: Ignore the effects of friction.)
A. There is not enough information given to answer the question.
B. Ball A and Ball B would hit the ground at the same time.
C. Ball B would hit the ground before Ball A.
D. Ball A would hit the ground before Ball B.
12. Which of the balls below has the most inertia when it is not in motion?
A. Ball X
B. They will have the same inertia.
C. Ball Y
D. Ball Z
13.
A ball is thrown upward with an initial speed of 20 m/sec. About 4 seconds later, the ball
returns and is caught. How fast was the ball traveling downward when it was caught?
(Note: Ignore the effects of friction.)
A. 20 m/sec
B. more than 20 m/sec
C. much less than 20 m/sec
D. 0 m/sec
14. A truck pulls a trailer from a standstill with a constant force. After 2 minutes, the truck is
moving at 48 km/hr. If the same truck applies the same constant force to pull a second trailer
which is 3 times the mass of the first trailer, how fast will the truck be moving after 2 minutes?
A. 24 km/hr
B. 16 km/hr
C. 48 km/hr
D. 64 km/hr
15.
The box in the above picture is falling from the top of a building to the ground. Two major
forces are acting on the box as it falls. Which force is represented by Arrow Q?
A. The force of gravity
B. The force of air resistance
C. The force of magnetism
D. The net force of the object