AP Physics 1 Work, Energy, and Energy Resources — practice questions
58 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP Physics 1 Work, Energy, and Energy Resources in the app →For a constant force F acting on an object that is displaced a distance d, with theta the angle between the foA person carries a briefcase at constant velocity across a level floor, so the upward force from her arm is peThe joule, the SI unit of work and energy, is defined from newtons and meters. How large is one joule in everyFor a force doing work on an object, under what condition is the work done negative rather than positive?A person holds a heavy briefcase perfectly still at their side, with no motion at all. According to the scientA person exerts a constant force of 75.0 N at an angle 35 degrees below the horizontal and pushes a lawn mowerWhen several external forces act on an object at once, how is the net work on that object defined?The work-energy theorem relates the net work done on a system to a change in which quantity?For an object of mass m moving at speed v, how is its translational kinetic energy defined?Kinetic energy depends on speed squared rather than on speed alone. What does this imply when comparing a car A 30.0-kg package on a roller belt conveyor moves at 0.500 m/s. What is its kinetic energy?You push on a 30.0-kg package with a constant applied force of 120 N through a distance of 0.800 m, while an oThe 30.0-kg package above starts at 0.500 m/s and receives 92.0 J of net work while being pushed 0.800 m. UsinAn object of mass m is lifted straight up at constant speed through a height h, so the lifting force equals itGravitational potential energy depends on the height chosen as the zero reference level, yet physicists say onA 0.500-kg mass hanging from a cuckoo clock is raised 1.00 m. Taking g = 9.80 m/s^2, what is the resulting chaA 60.0-kg person jumps onto the floor from a height of 3.00 m and lands stiffly, with knee joints compressing A roller coaster starts from rest at the top of a 20.0 m hill, with friction assumed negligible. What is its fIn the roller coaster calculation, the mass of the coaster cancels out of the final speed equation. What generA conservative force, such as the gravitational force, is defined by what property of the work it does?How is potential energy defined in general, beyond the specific case of gravitational potential energy?For an ideal spring obeying Hooke's law, with force constant k, the force needed to stretch it a distance x grWhen only conservative forces act on and within a system, what quantity remains constant throughout the procesA 0.100-kg toy car is propelled by a spring with force constant 250.0 N/m, compressed 4.00 cm. Assuming negligThe same toy car and spring from the previous problem sends the car up a slope that rises 0.180 m, still with In a system where only conservative forces act, what is meant by the term mechanical energy?Friction is described as a nonconservative force. What distinguishes a nonconservative force from a conservatiBecause work done against friction depends on path length, why is there no potential energy function associateThe work done by nonconservative forces changes the total mechanical energy of a system. When this nonconservaA baseball player slides to a stop on level ground with an initial speed of 6.00 m/s and mass 65.0 kg, experieSuppose the same 65.0-kg player instead slides with the same 6.00 m/s initial speed up a 5.00 degree incline, When the total nonconservative work Wnc done on a system is exactly zero, what does this imply about the systeHow is the law of conservation of energy stated in general terms?The most general statement of conservation of energy is KEi + PEi + Wnc + OEi = KEf + PEf + OEf. What does theThe efficiency Eff of an energy conversion process is defined as which ratio?In a coal-fired power plant, about 40% of the chemical energy in the coal becomes useful electrical energy. WhNuclear energy is one of several named forms of energy discussed alongside mechanical energy. How does nuclearAccording to the table of energy magnitudes, the estimated energy released in the Big Bang is about 10^68 joulAccording to the table of energy magnitudes, a single electron in an old television tube's beam carries about Power is defined as the rate at which what physical quantity is done or transferred?In SI units, the watt is the unit of power. How is one watt related to the joule and the second?A 60.0-kg woman runs up a 3.00 m high flight of stairs in 3.50 s, starting from rest and reaching a final speeA coal-fired power plant may produce 1000 megawatts of useful electric power while consuming chemical energy aA typical 60-W incandescent light bulb converts only 5 W of its electrical power into visible light. What happA 0.200-kW computer runs 6.00 hours per day for 30.0 days, with electricity priced at $0.120 per kilowatt-hourPower output of devices such as electric motors is sometimes expressed in horsepower instead of watts. How manThe basal metabolic rate, or BMR, of a person is defined as what specific quantity?Among the body's organs, the basal metabolic rate is divided unevenly. Which organ system receives the largestAbout what fraction of the calories a person burns in a day go toward sustaining basic body functions includedHuman energy consumption can be measured indirectly by measuring oxygen use, since the digestive process is baUseful work, as defined for a person's activities, includes climbing stairs or accelerating to a run. Why doesA surprisingly large share of all the energy the human body consumes goes toward a purpose unrelated to visiblAmong the principal energy resources used worldwide, which single fuel supplies about 40% of the world's energThe United States has 4.5% of the world's population. According to world energy use figures, what share of theRenewable energy sources include water, wind, solar, and biomass, since these cannot be used up. About what shMost countries rely heavily on nonrenewable resources for electricity, but some meet a large share from renewaOnly 10% of United States electricity is generated by renewable resources. Which renewable source supplies mosChina's energy mix differs sharply from that of most Western countries. What fuel dominates China's commercial