Phys 1000
Spring 2015
Name:_______________________________
Test 1
February 11, 2015
INSTRUCTIONS:
a) No books, notes, or other such materials are permitted.
b) NO CALCULATORS OR MOBILE PHONES ARE PERMITTED!!!
c) There is only one correct answer for each question. However, if you feel that more
than one answer is correct then you should choose the one you feel is most correct.
EACH QUESTION IS WORTH 5 POINTS
(There are 20 questions for a total of 100 points.)
g = 9.8 m/s/s = 32 ft/s/s
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1. Some dishes are placed on a tablecloth. The tablecloth is pulled out leaving the dishes in place because
(a) Only a small force is required to pull on the tablecloth.
(b) The dishes do not stick to the tablecloth.
(c) The inertia of the dishes keeps them in place.
(d) Friction keeps the dishes in place.
2. A tennis ball is projected horizontally at high speed from the edge of a table top at the same time that a
baseball initially at rest is dropped vertically from the same height. Neglecting air resistance and
assuming a level floor
(a) The baseball strikes the ground first because it travels a shorter distance.
(b) The tennis ball strikes the ground first because it is lighter.
(c) The baseball strikes the ground first because of its greater weight.
(d) The two balls strike the ground at the same time.
3. An ice skater can glide at nearly constant speed in a straight line across the ice because
(a) There is no friction between her and the ice.
(b) The force of the ice pushes her forward.
(c) Gravity does not act her.
(d) Inertia maintains her motion.
4. In the scientific method we learn physics in the order of
(a) Testing, observing, and hypothesizing.
(b) Newton’s three laws of motion.
(c) Observing, theorizing, and testing.
(d) Experimenting, testing, and observing.
5. A book is given a push and it slides across a table and comes to rest. It stops because
(a) Its inertia slows it down.
(b) All objects naturally prefer to be at rest.
(c) There is an outside influence that causes it to stop.
(d) Energy is not conserved.
6. In specifying the position or velocity of an object the phrase that is not correct is
(a) The Fetzer Center is 200 meters to the right.
(b) The plane flew west at 250 km/hour.
(c) The Bernhard Center is located about 900 feet east of Rood Hall.
(d) You walk 5 feet/second to the south.
7. You throw a ball vertically upward from your hand at a speed of 19.6 m/s. It rises, it stops, and returns
to your hand at the same height that you released it. Assuming no air resistance, how fast is the ball
moving just before it hits your hand on the way down?
(a) 0 m/s
(b) 4.9 m/s
(c) 9.8 m/s
(d) 19.6 m/s
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8. In the previous problem, the acceleration of the ball at the top of its flight is
(a) 0 m/s/s
(b) 4.9 m/s/s
(c) 9.8 m/s/s
(d) Cannot determine from the information given.
9. You stand on a bathroom scale in an elevator at the top floor level in a tall building. Your normal
weight is 150 lbs. The elevator starts suddenly downward. During this sudden downward motion,
which of the following weights could the scale read?
(a) 0 lbs
(b) 140 lbs
(c) 150 lbs
(d) 160 lbs
10. You drive a Ford Escort that is half as massive (i.e., heavy) as your friend's SUV. For you to
accelerate at the same rate as your friend
(a) You need to increase your speed by two times.
(b) You need twice the force.
(c) You need to reduce your speed to half.
(d) You need half the force.
11. A satellite orbiting the earth
(a) Remains in orbit because of gravity.
(b) Requires constant burning of its engines to remain in orbit.
(c) Has no mass.
(d) Experiences no gravity.
12. A ping-pong ball attached to a string hangs loosely from the rear view mirror of your car. You start
up and then travel at a constant speed in a straight line. The ping-pong ball will
(a) Deflect backwards while starting up and then hang straight down when moving at constant speed.
(b) Continually deflect backwards as long as you are moving.
(c) Always hang straight down.
(d) Deflect forward while starting and then hang straight down while traveling at constant speed.
13. When you swim, you move forward because
(a) The water exerts a greater force on you than you exert on the water.
(b) The water pushes you forward with the same force that you push on the water.
(c) You exert a greater force on the water than it exerts on you.
(d) You exert a force on the water, but the water exerts no force on you.
14. A child on a playground swing is pulled to one side and then released from rest.
(a) Energy is lost as the swing moves back and forth.
(b) The initial potential energy is converted to an equivalent amount of kinetic energy at the bottom
of the motion.
(c) The energy increases as the swing approaches the bottom of the motion.
(d) The speed at the bottom of the motion is the same regardless of how far the swing is pulled to the
side.
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15. When you jack up your car to change a flat tire, you are able to single-handedly lift your heavy car by
(a) Decreasing the amount of work required to lift the car.
(b) Exerting a small force while moving the jack through a large distance.
(c) Increasing the amount of work required to lift the car.
(d) Exerting a large force while moving the jack through a small distance.
16. When you throw a ball horizontally
(a) You increase its kinetic energy by decreasing its potential energy.
(b) Its inertia helps to get it moving.
(c) You do no work on it.
(d) You transfer kinetic energy to it by exerting a force through some distance.
17. A car accelerates forward starting from rest at a constant rate of 5 mi/hr/sec. After 2 seconds the car
travels at a certain speed and it has traveled a certain distance. After 4 seconds
(a) Its speed will be twice as great.
(b) The acceleration of the car will be four times greater.
(c) The car will have traveled twice as far.
(d) Its speed will be four times greater.
18. You ride in a small power boat at constant speed in a straight line. Under this condition
(a) No forces act on you.
(b) No power is required to keep the boat moving.
(c) Friction between the boat and the water is zero.
(d) There is no net force acting on you.
19. A golf ball and a feather are dropped simultaneously on the moon where there is no air.
(a) Neither falls because there is no gravity on the moon.
(b) The golf ball and the feather fall together at the same rate.
(c) The golf ball falls faster because it is heavier.
(d) The golf ball and feather fall the same as they would fall on earth where there is air.
20. To throw a ball as far as possible downrange on level ground, you should throw it
(a) At 450 above the horizontal.
(b) So that it remains in the air for the longest possible time.
(c) As fast as possible.
(d) At an angle greater than 450 above the horizontal.
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