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Name:______________________________ IPS - Physics Final Practice Exam 2010 1) A force a. is a push or a pull b. gives energy to an object c. can cause an object to change its motion d. can do all of the above 2) How much speed does a freely falling object gain during each second of fall? a. 5 m/s b. 10 m/s c. 20 m/s d. 25 m/s 3) Gravitational force between two objects depends on the a. masses of the objects and the distance between them b. mass of each object only c. distance between the objects only d. inertia and masses of the objects 4) According to the inverse-square law, the sound of a cricket will change if the cricket moves closer to you. If the cricket is three times as close how much louder will the sound be? a. 2 times louder b. 3 times louder c. 6 times louder d. 9 times louder 5) Work divided by time equals a. force b. distance c. power d. mass 6) For work to be done, the direction of a. motion must be perpendicular to the direction of the applied force b. the applied force must be opposite to the direction of the motion c. the applied force must be perpendicular to the direction of the motion d. the applied force must be the same as the direction of the motion 7) A unit of power is a a. Newton b. Newton-meter c. meter d. watt 8) A unit of work is a a. Newton b. Newton-meter c. meter d. watt 9) One joule of work is the same as one a. Newton b. Newton-meter c. meter d. watt 10) Energy is defined as a. power b. the ability to produce heat c. a change in motion d. the ability to do work or cause change 11) Potential energy is energy that is a. in motion b. stored c. not capable of doing work d. not capable of causing change 12) Kinetic energy is energy that is a. in motion b. stored c. not capable of doing work d. not capable of causing change 13) The kinetic energy of an object increases as the object a. slows down b. loses mass c. stops moving d. speeds up 14) Energy is measured in a. Newton’s b. meters c. watts d. joules 15) Energy associated with motion is called a. mechanical energy b. chemical energy c. electromagnetic energy d. heat energy 16) A diver on a platform has a PE of 6000 J. How much KE will the diver have when he is half way down to the water? a. 6000 J b. 3000 J c. 0 J 1 17) A diver on a platform has a PE of 6000 J. How much PE will the diver have when he reaches the end of his dive? a. 6000 J b. 3000 J c. 0 J 26) The electromagnetic waves with the longest wavelength are: a. microwaves b. gamma waves c. radio waves d. visible light waves 18) A transverse wave is a wave in which the a. motion of the medium and direction of the wave are the same b. motion of the medium and direction of the wave are at right angles to each other c. medium is in its liquid phase d. medium is in its solid phase 27) The electromagnetic waves with the highest energy are: a. microwaves b. gamma waves c. radio waves d. visible light waves 19) The crowding together of air molecules is called a a. trough b. compression c. crest d. rarefaction 20) Lambda () is the symbol for a. wavelength b. frequency c. amplitude d. cycles 21) The highest point of a wave is called a a. trough b. crest c. compression d. rarefaction 22) Light waves a. require a medium b. cannot travel through solids c. are caused by a vibrating object d. are electromagnetic waves 23) A wave with a frequency of 0.5 Hz and a speed of 10 m/s has a wavelength of a. 50 m b. 0.5 m c. 20 m d. 0.2 m 24) Calculate the frequency of a 15 m wave traveling at 200 m/s. a. 13.3 m b. 13.3 Hz c. 3000 m d. 3000 Hz. 25) Light shining through a bottle of water is often bent. This change in direction is called: a. reflection b. refraction c. diffusion d. interference 28) There is a repulsive force between two charged objects when a. charges are of unlike sign b. they have the same number of protons c. charges are of like sign d. they have the same number of electrons 29) Potential difference (pressure difference) is measured in a. amperes b. volts c. coulombs d. joules 30) There is a potential difference of 12 V across a resistor with 0.25 A of current in it. The resistance of the resistor is a. 48 ohms b. 25 ohms c. 12 ohms d. 0.021 ohms 31) Appliances connected so that they form a single pathway for charges to flow are connected in a(n) a. series circuit b. parallel circuit c. open circuit d. closed circuit 32) By Coulomb’s Law, if the charge on one of the particles is doubled, the force is a. unchanged. b. halved. c. doubled 33) When the resistance of a circuit is doubled and no other changes occur the current in the circuit is a. half b. doubled c. quadrupled 34) The units that measure energy are the same as the units that measure work. a. True b. False 2 35) Sound waves do not have crests. a. True b. False 36) When a wave moves through water, the particles of water move along with the wave. a. True b. False 37) We hear thunder before we see lightning. a. True b. False 38) As a fire truck approaches a person the frequency of the waves is greater in front of the truck than in back of the truck. a. True b. False 39) Materials that conduct electricity are insulators. a. True b. False 40) An object becomes electrically polarized (charged) when its charges are aligned so that one side has a slight excess of positive charges and the other side has a slight excess of negative charge. a. True b. False 41) Convert 325 miles to km 1 mi = 1.609 km a. 512 km b. 225.9 km c. 522.9 km d. 500 km 42) Convert 210 kg to Newton’s. 1 kg = 9.8 N a. 2058 N b. 1258 N c. 205.8 N d. 310 N 43) Convert 28 miles to meters. 1 mi = 1.609 km a. 4500 m b. 45073 m c. 428 m d. 5280 m 44) Convert 76 pounds to grams. 2.2 lbs = 1 kg a. 0.16 g b. 987 g c. 34473.6 g d. 44337 g 45) Convert 15 Newton’s to pounds. 2.2 lbs = 9.8 N a. 1.53 lbs b. 3.37 lbs c. 33.7 lbs d. 337 lbs 3