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Final Exam Review Physical Science 1) What 2 factors are involved in calculating speed? a)Distance and speed Distance and time b)Distance c)Velocity and time d)Velocity and speed 2) What is the equation for acceleration? a) time interval/ change of velocity b) change of velocity/ time interval c) distance/time d)Time/distance 3) A bike goes from rest to 30 km/h in 20 seconds what is the acceleration? a) 1.25 b) 50 c) 10 1.5 d) 1.5 4) In 3 seconds a car increases its speed from 40km/h to 45km/h while a bicycle goes from rest to 5km/h which has a a) car greater b) bike acceleration? c) same same d) I don’t know 5) The rate at which velocity changes with time where the change in velocity may be in magnitude or direction or both. This is the definition of: a) speed b) velocity c) free fall d) acceleration 6) The formula for distance traveled in free fall is d = a) 1/2gt(2) b) 1/2gt22 2 c) 1/2g t d) 1/2tg(2) 7) The amount of matter in an object is a) weight b) mass c) volume d) area 8)The amount of space taken up by an object is a) weight b) mass c) volume d) surface area 9) “Every material object continues in its state of rest, or in uniform motion in a straight line, unless acted upon by an unbalanced force.” What is this law? a) Newton’s first law b) Newton’s 2nd law c) Newton’s 3rd law d) Momentum law 10) The acceleration of an object is directly proportional to the a) mass b) force c) speed d) velocity 11) What is force? a) potential energy b) A a push or a pull c) work d) kinetic energy 12) Acceleration is inversely proportional to: a) force b) mass c) work d) pressure 13) When the acceleration of an object is zero, we say that the object doing what? a)Free falling b) changing direction c) speeding up d)Constant constant motion or staying still 14) For every action there is an equal and opposite: a) energy flow b) acceleration c) reaction d) Newton's 3rd law 15) What is the correct formula for momentum? a) mass/volume b) mass x volume c) Mass mass x velocity d) velocity/mass 16) What is the power if the voltage is 110 V and the current 4 Amps? a) 27.5 W b) 27.5 Ohms c) 440 Ohms d) 440 W W 17) V = IR a) Ohm’s Ohm’s Law Law b) Coulomb’s Law c) Voltage Law d) Electric Power 18) The ability to do work is: a) energy energy b) potential energy c) acceleration d) motion 19) What law is this? Energy cannot be created or destroyed; it may be transformed from one for into another, but the total amount of energy never changes., a) conservation of mass b) conservation of matter c) conservation of momentum d) Conservation of energy 20) If an object has energy it: a) Has has the the ability ability to to do do work work b) must have kinetic energy c) is doing work d) Has force 21) What is the potential energy of 1 kg. block on a ledge 10 meters high a) 980 kg*m b) 98 kg*m c) .98 kg*m d) 9.8 kg*m 22) What is the formula for work? a) force x circumference b) force/ area c) Force x distance d) Distance and weight 23)Which of the following are most important in determining the amount of gravity between two objects? a) time and weight b) Mass and distance c) Force and mass d) distance and weight 24)What law is this: F = kq1q2 2 d ? a) Ohm’s Law b) Law of Gravity c) Coulomb’s Law d) Law of Conservation of energy 25)Which circuit would allow other lights to stay lit if one went out? a) short circuit b)Parallel Parallelcircuit circuit c) Series circuit d) Open circuit 26) What is density? a) how heavy an object is b) force/area c) Mass/volume mass/volume d) weight/volume 27) Which is not a way to generate static charge? a) induction b) touching c) conduction d) friction 28) What is the momentum of a 1200kg. car traveling at 8 m/s? a) 150 kg*m/s b) 9600 kg*m/s c) 1208 kg*m/s d) Cannot be determined with information given 29) Calculate the speed of a car that went 144 miles in 1 hour 30 minutes a) 96 mph b) 216 mph c) 72 mph d) 115 mph 30) How much power is used if a student weighing 520 N. climbs the stairs (vertical height) of 3.6 meters in 5 s. a) 104.72 W b) 374.4 W c) 28.9 W d) 9360 W 31) In order to increase power,the student in the previous problem could: a) Lose weight b) Gain weight yet keep the same speed c) Climb the stairs slower d) Climb the stairs faster e) Both b and d 32) What is the force required to accelerate a 32 kg. box at a rate of 3 m/s2? a) 35 N b) 96 N c) 10.67 N d) There are several forces 33) Distilled water has a density of _________ g/cm3 a) 0 b) 9.8 c) 2 d) 1 34) Heat is best described as: a) The transfer of thermal energy b) How hot something may be c) Thermal energy d) Temperature 35) Newton’s second law states a) F= ma b) P1V1 = P2V2 c) D = m/v d) P = force/area 36) In the electromagnetic spectrum, the waves with the highest energy are: a) microwaves b) X rays c) Gamma rays d) Radio waves 37) A measure of the average kinetic energy of the molecules is: a)temperature temperature b) heat c) Thermal energy d) friction 38) As water freezes, the density decreases because the________ increases a) pressure b) volume c) ice d) Thermal energy 39) How much kinetic energy does a 24 kg. cart traveling 3m/s have? a) 108 J b) 72 J c) 8 J d) None of these answers 40) An object that is in free fall but not accelerating any more must be ___________ a) on the ground b) experiencing c) At terminal velocity d) deceased 41) The temperature of boiling water in Celsius is ___ degrees. a) 212 b) 100 c) 32 d) 0 42) After 4 seconds of free fall, an object should be traveling at ___ m/s a) 10 b) 15 c) 25 d) 40 43) The weight of a 2 kg. Box of chocolates would be____ N. a) 2 b) 20 c) .2 d) 12 44) What is the net force if an object is pushed west with a force of 5 N and east with a force of 25 N. a) 20 N east b) 20 N west c) 30 N east d) 30 N west 45) A force vector shows both ________ and direction. a) pressure b) Magnitude (amount) c) energy d) power 46) A car and a truck collide head-on. The car has a mass half that of the truck. The impact force of the truck on the car is 500 N. what is the impact force of the car on the truck a) 250 N b) 500 N c) 750 N d) Not sure 47) An object following a straight-line path at constant speed a) has zero acceleration b) Must be moving in a vacuum or in the absence of air friction. c) Has no forces acting on it d) Has a net force acting in the direction of motion 48) A 20kg. Cart moving 5m/s collides with a stationary cart with a mass of 5kg. They stick together after the crash. How fast are they going? a)2 b) 4 c) 5 d) 1 49) How much work is done when a 12 kg object is lifted 2 meters? a) 24 N*m b) 120 N*m c) 240 N*m d) Cannot be determined 50) The method of heat transferring which fluids move thermal energy in currents is: a) conduction b) radiation c) Lava flows d) Convection