Term
if you push for a half hour or a whole hour against a stationary wall.. 

Definition
no work on the wall is done in either case. 


Term
if you push an object twice as far while applying the same force, you do.. 

Definition


Term
if you find the twice as much work is needed to perform a task but it takes twice as much time, the amount of power required is... 

Definition


Term
a job is done slowly, while an identical job is done quickly, both jobs require the same amount of work, bt different amounts of... 

Definition


Term
if you do work on an object in onethird the usual time, your power output is... 

Definition
three times the usual power output 


Term
do 100J of work in 50s and your power output is... 

Definition


Term
if an object is raised twice as high, its potential energy will be... 

Definition


Term
a 1000kg car and a 2000kg car are hoisted the same distance. raising the more massive car requires... 

Definition


Term
an object that has kinetic energy must be 

Definition


Term
an object may have potential energy because of its... 

Definition


Term
a clerk can lift containers a vertical distance of 1 meter or can roll them up 2 meter long ramp to the same elevation. with the ramp, the applied force required is about.... 

Definition


Term
when an automobile is braked to a stop, its kinetic energy is transformed to.. 

Definition


Term
a ball rolling down an incline has its maximum potential energy at... 

Definition


Term
a ball rolling down an incline has its maximum kinetic energy at... 

Definition


Term
what task requires the most work, lifting a 50 kg sack 2 meters or lifting a 24 kg 4 meters? 

Definition
both require the sam amount of work. 


Term
a TV set is pushed a distance of 2 m with a force of 20 N. how much work is done on the set? 

Definition


Term
it takes 40 J to push a large box 4 m across a floor. assuming the push is in the same direction as hte move, what is the magnitude of the force on the box? 

Definition


Term
a 2kg mass is held 4 meters above the ground. what is the approximate potential energy of the mass with respect to the ground? 

Definition


Term
two identical arrows, one with twice the kinetic energy aof the other, are fired into a hay bale, the faster arrow will penetrate.... 

Definition
twice as far as the slower arrow. 


Term
a car moves 4 times as fast as another identical car,. compared to the slower car, the faster car has... 

Definition


Term
strictly speaking, more fuel is consumed by your car if an air conditionar, headlights, or even a radio is turned on. the statement is... 

Definition


Term
a machine puts out 100 watts of power for every 1000 watts put into it. the efficiency of the machine is.... 

Definition


Term
a car moving at 50 km/hr skids 20 m with locked breaks. how far will the car skid with locked breaks if it were traveling at 150 km/hr? 

Definition


Term
which has greater kinetic energy, a car traveling at 30 km/hr or a car of hlf the mass traveling at 60 km/hr? 

Definition


Term
a driver who weighs 500 N steps off a dving board that is 10 m above the water. the diver hits the water with kinetic energy of... 

Definition

