Phys 1114 Ch 6
Simple Machine - Right Ansa -Any mechanical device that multiplies the effect of an
applied force
Lever - Right Ansa -By applying a small force at one end of a lever a larger force can be
exerted on the rock at the opposite end
Pulley - Right Ansa -Net result is that you can lift a weight a certain height by applying a
force equal to only half the weight being lifted
T/F When using a pulley you must pull the rope twice the distance the weight is lifted -
Right Ansa -True
What is the result for an ideal simple machine? - Right Ansa -Work output=work input
Mechanical advantage - Right Ansa -Ratio of output force to input force
Work - Right Ansa -Depends on both the strength of the applied force and the distance
the object is moved
Work formula - Right Ansa -W=Fd
T/F Only the portion of the force that is perpendicular to the floor is used in computing
work - Right Ansa -False PARALLEL
Power - Right Ansa -The rate of doing work
Power Formula - Right Ansa -P=w/t
, Kinetic Energy - Right Ansa -the energy of an object associated with its motion and is
equal to 1/2 the mass of object times the square of the speed
Kinetic Energy Formula - Right Ansa -KE=1/2mv^2
Negative Work - Right Ansa -the work done by a force acting in a direction opposite to
the objects motion W=-Fd
Potential Energy - Right Ansa -work is done but no KE is gained
Potential Energy Formula - Right Ansa -PE=mgh
T/F If force is applied to lift a crate, the gravitational potential energy of crate had
decreased - Right Ansa -False INCREASED
Elastic Force - Right Ansa -a force that results from stretching/compressing an object
Elastic Force formula - Right Ansa -F=-kx
Elastic Potential Energy - Right Ansa -total work done by average force needed to
stretch spring
Elastic Potential Energy formula - Right Ansa -PE=1/2kx^2
Conservation of energy - Right Ansa -the total energy of a system remains constant
Conservative Forces - Right Ansa -Forces for which energy can be completely
recovered
T/F Gravity and Elastic forces are conservative unlike friction - Right Ansa -True
Simple Machine - Right Ansa -Any mechanical device that multiplies the effect of an
applied force
Lever - Right Ansa -By applying a small force at one end of a lever a larger force can be
exerted on the rock at the opposite end
Pulley - Right Ansa -Net result is that you can lift a weight a certain height by applying a
force equal to only half the weight being lifted
T/F When using a pulley you must pull the rope twice the distance the weight is lifted -
Right Ansa -True
What is the result for an ideal simple machine? - Right Ansa -Work output=work input
Mechanical advantage - Right Ansa -Ratio of output force to input force
Work - Right Ansa -Depends on both the strength of the applied force and the distance
the object is moved
Work formula - Right Ansa -W=Fd
T/F Only the portion of the force that is perpendicular to the floor is used in computing
work - Right Ansa -False PARALLEL
Power - Right Ansa -The rate of doing work
Power Formula - Right Ansa -P=w/t
, Kinetic Energy - Right Ansa -the energy of an object associated with its motion and is
equal to 1/2 the mass of object times the square of the speed
Kinetic Energy Formula - Right Ansa -KE=1/2mv^2
Negative Work - Right Ansa -the work done by a force acting in a direction opposite to
the objects motion W=-Fd
Potential Energy - Right Ansa -work is done but no KE is gained
Potential Energy Formula - Right Ansa -PE=mgh
T/F If force is applied to lift a crate, the gravitational potential energy of crate had
decreased - Right Ansa -False INCREASED
Elastic Force - Right Ansa -a force that results from stretching/compressing an object
Elastic Force formula - Right Ansa -F=-kx
Elastic Potential Energy - Right Ansa -total work done by average force needed to
stretch spring
Elastic Potential Energy formula - Right Ansa -PE=1/2kx^2
Conservation of energy - Right Ansa -the total energy of a system remains constant
Conservative Forces - Right Ansa -Forces for which energy can be completely
recovered
T/F Gravity and Elastic forces are conservative unlike friction - Right Ansa -True
