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Name: _________________________________ Block: _____ Date: _____/_____/_____ Conceptual Physics Review Packet Chapter 2: Linear Motion A car starts from rest and after 6 seconds it is moving at 42 m/s. What is the car’s average acceleration? a. 0.17 m/s2 c. 6 m/s2 2 b. 1.67 m/s d. 7 m/s2 A ball is thrown upwards and caught at the same height as it comes back down. In the absence of air resistance, the speed of the ball just before it is caught would be _____. a. less than the speed it had when thrown upwards b. more than the speed it had when thrown upwards c. the same speed it had when thrown upwards d. 0 m/s When a basketball player jumps, once the feet are off the floor, the jumper’s acceleration _____. a. varies with body orientation c. is usually greater for taller players b. depends on launch speed d. is always equal to g Suppose you take a trip that covers 180 km and takes 6 hours to make. Your average speed is _____. a. 30 km/h c. 180 km/h b. 60 km/h d. 360 km/h A freely falling object starts from rest. After falling for 1 minute, it will have a speed of about _____. a. 6 m/s c. 16 m/s b. 60 m/s d. 600 m/s Chapter 3: Projectile Motion A ball thrown in the air will never go as far as physics ideally would predict because _____. a. the ball would never land c. air resistance slows the ball b. gravity is acting on it d. all of the above A scalar is a quantity that has _____. a. magnitude and time b. magnitude and direction c. time and direction d. only a magnitude What is the resultant of a 6-unit vector and an 8-unit vector at right angles to each other? a. 1 units c. 7 units b. 5 units d. none of the above 1 Name: _________________________________ Block: _____ Date: _____/_____/_____ Conceptual Physics Review Packet An object is dropped and falls freely to the ground with an acceleration of g. If it thrown upward at an angle instead, its acceleration would be _____ a. less than g c. g b. more than g d. zero In order to find the components of a vector, you should _____. a. draw the vector with the correct magnitude and orientation b. measure the sides of the right triangle c. draw a right triangle so that the vector is the hypotenuse d. all of the above Chapter 4: Newton’s 1st Law - Inertia The astronomer Copernicus publicly stated in the 1500s that Earth _____. a. does not move c. is slowing down b. revolves around the sun d. is the center of the solar system The law of inertia states that an object _____. a. will continue moving at the same velocity unless an outside force acts on it b. will continue moving in a straight line unless an outside force acts on it c. at rest will remain at rest unless acted on by an outside force d. all of the above If the force of gravity suddenly stopped acting on the planets, they would _____. a. spiral slowly away toward the sun b. continue to orbit the sun c. move in a straight lines tangent to their orbits d. fly straight away from the sun One object has twice as mass as another object. The first object also has twice as much _____. a. velocity c. inertia b. gravitational acceleration d. all of the above An object following a straight line path at constant speed _____. a. must be falling b. has a net force acting on it in the direction of motion c. has zero acceleration d. none of the above Chapter 5: Newton’s 2nd Law – Force & Acceleration A tow truck exerts a force of 2000 N on a car, accelerating at 2 m/s2. What is the mass of the car? a. 667 kg c. 8000 kg b. 1000 kg d. 2000 kg 2 Name: _________________________________ Block: _____ Date: _____/_____/_____ Conceptual Physics Review Packet A tennis ball and a solid steel ball of the same size are dropped at the same time. In the absence of air resistance, which ball has the greater force acting on it? a. the tennis ball b. neither c. the steel ball How much force is needed to accelerate a 4 kg physics book at 0.5 m/s2? a. 2.0 N c. 8.0 N b. 0.5 N d. 0 N A tennis ball and a solid steel ball of the same size are dropped at the same time. In the absence of air resistance, which ball has the greater acceleration? a. the tennis ball b. neither c. the steel ball A car accelerates at 4.5 m/s2. Its speed changes from 0 m/s to 18 m/s. How long did it take to achieve this speed? Chapter 6: Newton’s 3rd Law – Action & Reaction A high school student hits a nail with a hammer. During the collision, there is a force _____. a. on the nail but not on the hammer b. on the nail and also on the hammer c. on the hammer but not on the nail Forces always occur ______. a. as single quantities b. by themselves c. in pairs d. in triplets According to Newton’s third law, if you push gently on something, it will push _____. a. gently on something else c. gently on you b. on you only if you are not moving d. all of the above A woman weighing 450 N sits on the floor. She exerts a force of _____ on the floor. a. 4.5 N c. 450 N b. 45 N d. 4500 N If you stomp on the ground with a force of 175 N downward, with what force does Earth push upward? Chapter 7: Momentum Which of the following is most closely related to mass? a. inertia in motion c. momentum b. inertia d. change in momentum 3 Name: _________________________________ Block: _____ Date: _____/_____/_____ Conceptual Physics Review Packet Which of the following is most closely related to momentum? a. inertia in motion c. impulse b. inertia d. mass times acceleration Impulse _____. a. is the change in momentum b. equals force multiplied by time c. is measured in Newton-seconds d. all of the above Which of the following situations most closely resembles an inelastic collision? a. a tennis racquet striking a tennis ball c. a player kicking a soccer ball b. a baseball being struck by a bat d. a linebacker tackling a running back What is the difference between an elastic and an inelastic collision? Give an example of each. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Chapter 8: Energy The rate at which work is done is called power. (T or F) The energy an object has by virtue of its motion is called kinetic energy. (T or F) If you lift one load up two stories, how much work is done compared to lifting the same load up one story? a. four times as much c. the same amount b. twice as much d. half as much How much work is done on a 50 N rock that is lifted straight up to a height of 10 m? a. 500 J c. 10 J b. 50 J d. 1 J A toy cart moves with a kinetic energy of 40 J. What is the kinetic energy if the speed is doubled? Chapter 11: Rotational Mechanics The distance between the turning axis and the point of contact of a perpendicular force is called the fulcrum. (T or F) 4 Name: _________________________________ Block: _____ Date: _____/_____/_____ Conceptual Physics Review Packet If a football is kicked so the force on the ball is through the center of gravity, the ball will _____. a. tumble end over end in the air b. not even get into the air c. spin about its axis in the air d. move through the air without tumbling or spinning Any solid cylinder will roll down an incline with greater acceleration than any hollow cylinder if the _____ a. diameter of the solid cylinder is larger c. mass of the solid cylinder is large b. mass of the solid cylinder is small d. none of the above are necessary When an ice skater pulls in his hands to turn faster _____. a. angular momentum must be conserved c. his rotational speed changes b. his moment of inertia changes d. all of the above Two people sit on a balanced seesaw. When one person leans toward the center of the seesaw, that person’s end of the seesaw will _____. a. rise b. fall c. stay at the same level Chapter 32: Electrostatics What is the charge of an electron? a. +1.6 10 – 19 C b. zero What is the charge of a proton? a. +1.6 10 – 19 C b. zero What is the charge of a neutron? a. +1.6 10 – 19 C b. zero Describe the electrical force between two protons. a. attractive b. repulsive c. – 1.6 10 – 19 C N m2 d. 9 10 9 C2 c. – 1.6 10 – 19 C N m2 d. 9 10 9 C2 c. – 1.6 10 – 19 C N m2 d. 9 10 9 C2 c. no force exists d. none of the above A distance of 8.0 m separates two charges. The charge of the first object is 0.015 C and the charge of the second object is 0.045 C. Find the magnitude of the force between the two charges. 5 Name: _________________________________ Block: _____ Date: _____/_____/_____ Conceptual Physics Review Packet Chapter 33: Electric Fields & Potential Electric potential energy of a charged object is a result of its _____. a. momentum c. mass b. location d. velocity The electric field around an electron _____ if the distance from the electron is doubled. a. is half as much c. stays the same b. is twice as much d. is one-fourth as much Compare electrical potential energy to gravitational potential energy. How are they similar? How are they different? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ What is the force exerted on a 3.2 C charge in an electric field of 2.4 106 N/C? An electron experiences a force of 3.5 10–6 N. Calculate the strength of the electric field surrounding the electron. Chapter 34: Electric Current Electrical resistance is measured in units called _____. a. amperes b. current c. voltage d. ohms In terms of electricity, most of North America operates on _____. a. 120 V c. alternating current b. 60 Hz d. all of the above Electric power is defined as _____. a. current times voltage c. current divided by voltage b. voltage divided by resistance d. current times resistance What do the abbreviations AC and DC stand for? Explain the difference between the two. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ 6 Name: _________________________________ Block: _____ Date: _____/_____/_____ Conceptual Physics Review Packet Explain the difference between a dry cell and a generator. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Chapter 35: Electric Circuits Electricity is the result of the flow of _____. a. protons b. electrons c. neutrons d. atoms Closing a switch in a circuit will _____. a. stop the flow of electricity b. change the direction of the current c. allow electricity to flow d. blow the fuse The equivalent resistance in a(n) _____ circuit can be found by calculating the sum of all resistors in the circuit. a. short c. parallel b. compound d. series Describe the difference between a series circuit and a parallel circuit. State your answer in terms of the amount of current through and voltage across resistors. ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Sketch a schematic diagram of a series circuit using a 9 V battery, a 45 resistor, and a 25 resistor. Be sure to label each element with the appropriate numerical values and units. Chapter 36: Magnetism Moving electric charges will interact with _____. a. an electric field b. a magnetic field When placed in a magnetic field, a compass will _____. a. line up parallel to the magnetic field lines circles b. line up perpendicular to the magnetic field lines c. a gravitational field d. a baseball field c. spin around in d. all of the above 7 Name: _________________________________ Block: _____ Date: _____/_____/_____ Conceptual Physics Review Packet Magnetic domains are _____. a. regions that are not magnetized magnetically aligned b. clusters of atoms randomly aligned c. clusters of atoms d. none of the above The magnetic field lines around a current-carrying wire _____. a. extend straight out from the wire in all directions b. are parallel to the wire along its entire length c. form concentric circles about the wire d. extend from the positive end of the wire to the negative end The force on an electron moving in a magnetic field is greatest when its motion is _____. a. perpendicular to the field lines c. parallel to the field lines b. 45° from the horizontal d. none of the above Chapter 37: Electromagnetic Induction The process of inducing voltage by changing the magnetic field around a conductor is called _____. a. electromagnetic radiation c. electromagnetic waves b. electric current d. electromagnetic induction Quickly moving a magnet back and forth inside a coil of wire creates _____. a. a stronger magnet c. a gravitational field b. voltage and current in the wire d. all of the above What type of current is created through magnetic induction? a. direct current (DC) c. alternating current (AC) b. water current d. current events What is the difference between a motor and a generator? ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ The primary coil of a transformer has 2,000 turns and receives 120 V. What is the voltage induced in the secondary coil if it has 20,000 turns? 8