1) What two measurements are needed calculate speed? a) acceleration and time  b) direction and time c) distance and time d) displacement and time  2) A 6.0 kg object move with an acceleration of 2.0 m/s^2 . What is the net force acting on the object? a) 3 N b) 4 N c) 1/3 N d) 12 N 3) A car travelling at 180 km/h suddenly crashes to a full stop on a solid concrete wall. If the driver was not wearing any seatbelt, he will be expected to ______. a) stay still and motionless as soon as the car stops as well b) move towards the backseat with the same speed  c) Keep moving forward at the same speed  d) move towards the car roof with the same speed 4) which of the following groups of simple machines represent variations of an inclined plane? a) pulley , lever and wedge b) pulley, wheel and axle c) screw, wedge d) wheel and axle, screw 5) Find the force needed to lift a 2,000 N weight using a machine with mechanical advantage of 20 a) 1000 N b) 40,000 N c) 100 N d) 20 N 6) At what point on a roller coaster is the gravitational potential energy (GBE) the lowest? a) at the top of the highest drop b) at the lowest point of the roller coaster  c) while on the decline d) while on the incline 7) if the specific heat of water is 4180 J/kg.c° , what is the amount of heat gained by 2.0 kg of water when heated from 23°C to 25°C? a) 16 000 J b) 17 000 J c) 18 000 J d) 19 000 J 8) A metal spoon is used to stir hot tea. The spoon will feel hot because of ______. a) evaporation b) convection c) radiation d) conduction 9) Calculate the resistance in a circuit if the current flowing is 12.0 amperes and the voltage is 480.0 volts a) 4.00 Ω b) 40.0 A c) 40.0 Ω d) 4.00 A 10) which of the following contains a piece of metal that bends when the current is so large? a) fuse b) circuit breaker c) wall socket d) fuse box 11) The strength of the the electromagnet depends on all the following except ______. a) the core material b) the amount of electric current  c) number of turns d) the direction of the current  12) An object is placed in front of a convex mirror. The image formed will be ______ a) virtual and reduced  b) virtual and enlarged c) real and reduced d) real and enlarged

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