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1- the kinetic energy of a pendulum is greatestA- when its potential energy is greastestB- at the bottom of its swingC- at the top of its swingD- when its total energy is greatest2- which of the following four objectshas the greatest kinetic energy?a- an object of a mass mmoving with speed 4vb- an object of a mass 3m moving withspeed 2vc- an object of a mass 4m movingwith speed vd- an object of a mass 2m movingwith speed 3ve- none of these, all four objectshave equal kinectic energy3- work requiresa- motionb- zero momentumc- zero net forced- force perpendicular to the directionof motion
4- if u lift a 10-N weight vertically10m above the ground you area- doing work against gravityb- doing work against inertiac- doing work against frictiond- doing none of these5- a child swings on a 14m rope. Thehighest point of her swing is 3.0m above the ground. When the childat the lowest point 1.0m above the ground , her speed isgreatest.A- trueB- false6-mechanical energy
a- is always the total energy ofa system.b- is the sum of the energies of motionand positionc- is always conservedd- necessarily involves gravitational potential energy7- the average adult radiates heatenergy at the same rate asa- a 100W light bulbb- a 10W light bulbc- A 100 kW light bulbd- none of these8- the largest reserve of energy in theU.S. is in the form ofa- oil b-coal c-natural gas d-nuclear
9- Temperature is a relative measure ofa- latent heat b- hotness andcoldness c- internal energy d- specificheat
10- the average kinetic energy of the molecules in a gas is ameasure ofa- volume b- density c-temperature d- heat content
11- a change of phase takes place at a constanta- volume b- temperature c- heat d-pressure
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