Simple Machines Question Preview (ID: 34383)


Physical Science Final. TEACHERS: click here for quick copy question ID numbers.

A variation of an inclined plane is a
a) wedge
b) lever
c) wheel and axle
d) pulley

A machine is classified as a compound machine if it
a) is very efficient
b) has an IMA greater than 1
c) has moving parts
d) is made up of two or more simple machines that operate together

A wheelbarrow is an example of a
a) wedge
b) wheel and axle
c) inclined plane
d) lever

What type of simple machine is found on a water bottle cap?
a) lever
b) pulley
c) wheel and axle
d) screw

Which is not a type of simple machine?
a) Spring
b) Pulley
c) Screw
d) Wedge

Work is
a) Energy from the sun
b) a force that moves an object
c) a force that pulls you towards the Earth
d) a type of machine

A screw is made up of ____ wrapped around a post or rod
a) springs
b) threads
c) strings
d)

Jan is using a screwdriver to insert a screw. The screwdriver is being used as
a) a pulley
b) a screw
c) a lever
d) a wheel and axle

How much power is necessary to do 50 joules of work in 5 seconds?
a) 5 watts
b) 10 watts
c) 50 watts
d) 250 watts

Kenny lifts a 150 N bucket of water .5 meters in 3 seconds. What is the amount of work done on the bucket?
a) 25 J
b) 25 watts
c) 75 J
d) 75 watts

Calculate the work needed to push a block with 4 N of force a distance of 10 meters.
a) .4 J
b) 2.5 J
c) 4 J
d) 40 J

Power is measured in units called
a) Joules
b) Pounds
c) Watts
d) Newtons

The power of a light bulb that converts electric energy at a rate of 100 joules per second is
a) 50 watts
b) 200 watts
c) 100 watts
d) 40 watts

Work equals force times
a) energy
b) velocity
c) distance
d) mass

A lever needs three things to work
a) a top, a bottom, and a middle
b) a fulcrum, a load, and effort
c) a force arm, a lever, and a screw
d)

A hockey puck slides across an ice rink more easily than it does across a rough concrete surface, why?
a) there is more friction on the ice rink
b) there is less friction on the ice rink
c) there is less gravity on the ice rink
d) there is more gravity on the ice rink

Which of these shows unbalanced forces at work on an object?
a) a car driving at a constant 25 miles per hour on a straight street
b) a water skier pulled by a boat at a constant 30 mph
c) an ice skater turning as he skates around an ice rink
d) a bicycle chained to a bike rack at school

For work to be done on an object
a) some force need only be exerted on the object
b) the object must move some distance as a result of a force
c) the object must move, whether or not a force is exerted on it
d) the object must not move

The use of a force to move an object some distance is called
a) mass
b) work
c) power
d) time

Which of these is an example of work being done on an object
a) holding a heavy piece of wood at a construction site
b) trying to push a car that doesn't move out of deep snow
c) pushing a child on a swing
d) holding a door shut on a windy day so it doesn't blow open

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