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If a barbell weighs 160 N, what other information do you need to calculate how much work it takes to lift it?
how high the barbell is being lifted
Less force is needed to move the object over a longer distance
inclined planes and levers
it is used to overcome the friction created by the machine
power
power
a school crossing gurad raises a stop sign to weigh 10 N
which has a larger input force
How does a ramp make lifting a heavy object easier?
how high the barbell is being lifted
Less force is needed to move the object over a longer distance
inclined planes and levers
it is used to overcome the friction created by the machine
power
power
a school crossing gurad raises a stop sign to weigh 10 N
which has a larger input force
In which situation is a person doing work on an object?
how high the barbell is being lifted
Less force is needed to move the object over a longer distance
inclined planes and levers
it is used to overcome the friction created by the machine
power
power
a school crossing gurad raises a stop sign to weigh 10 N
which has a larger input force
The rate at which energy is transferred
how high the barbell is being lifted
Less force is needed to move the object over a longer distance
inclined planes and levers
it is used to overcome the friction created by the machine
power
power
a school crossing gurad raises a stop sign to weigh 10 N
which has a larger input force
If an identical stack of books is lifted the same distance and one person does the job twice as fast, which of the following is done twice as much?
how high the barbell is being lifted
Less force is needed to move the object over a longer distance
inclined planes and levers
it is used to overcome the friction created by the machine
power
power
a school crossing gurad raises a stop sign to weigh 10 N
which has a larger input force
Which of the following are simple machines used by Eqyptians to build pyramids?
how high the barbell is being lifted
Less force is needed to move the object over a longer distance
inclined planes and levers
it is used to overcome the friction created by the machine
power
power
a school crossing gurad raises a stop sign to weigh 10 N
which has a larger input force
By conparing the mechanical advantage of two machines, what can you tell about the machine?
how high the barbell is being lifted
Less force is needed to move the object over a longer distance
inclined planes and levers
it is used to overcome the friction created by the machine
power
power
a school crossing gurad raises a stop sign to weigh 10 N
which has a larger input force
If the work output of a machine is always less than the work input, where does the missing work go?
how high the barbell is being lifted
Less force is needed to move the object over a longer distance
inclined planes and levers
it is used to overcome the friction created by the machine
power
power
a school crossing gurad raises a stop sign to weigh 10 N
which has a larger input force
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