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Science Lever and Pulley/ Wedge
Created by ftbrady
Instructions:
-
1.
the fixed point which a lever turns on is called
-
2.
other than multiplying a force, what else can levers do
-
3.
how would you determine what class a lever is
-
4.
what happens to the force needed to move an object as you increase the length of effort arm
-
5.
what would happen to the force required if you decreased the length of the effort arm?
-
6.
ALL LEVERS make work easier
-
7.
pulleys can_____ a force or change is ______
-
8.
3 types of pulleys
-
9.
how do you find the mechanical advantage of a block and tackle
-
10.
ALL PULLEYS make work easier
-
11.
how does the distance of the string you pull compare to the distance the weight if lifted when using a block and tackle system
-
12.
what is the MA of a single fixed pulley?
-
13.
what is the MA of a single moveable pulley
-
14.
what makes something a compound machine instead of a SM
-
15.
label each machine S simple or C compound
-
16.
list 3 of your own examples of CM
-
17.
mechanical advantage is how much the machine _____ your force
-
18.
what does it mean about a machine if it has a mechanical advantage of 1
-
19.
would machines with higher mechanical advantage take more or less effort force to make some move
-
20.
would machines with higher mechanical advantage take more or less work to make something move
-
21.
if you have a choice between a machine with a MA of 4 and a machine with an MA of 6, which machine would it make more sense to use
-
22.
objects with larger radius_______, object with smaller radius ________
-
23.
what would take less force to turn an axle with a diameter of 10 cm using a 50 cm or a 100 cm wheel
-
24.
why would the 100 cm wheel be easier
-
25.
what would require the least amount of work to turn axle with diameter of 10 cm using 50 or 100 cm wheel
-
26.
what is a specific advantage of using a screw instead of an inclined plane
-
27.
what does the wedge do as it moves into a matereial
-
28.
what is the major difference between the wedge and an inclined plane
-
29.
if you have 2 wedges that are 8 cm on top but A is shorter than B which would require the least amount of force
-
30.
What is the rule for question 29
-
a.
________, ________,____________
-
b.
MA of 6 ; you would not have to use as much effort force
-
c.
B it has a greater distance (length)
-
d.
force needed would decrease as you increase the effort arm
-
e.
it has a larger wheel and when you increase the effort distance, you decrease the effort force needed
-
f.
direction
-
g.
count the sections of rope supporting the weight
-
h.
multipplies
-
i.
change the direction of a force
-
j.
the machine doesn't increase your effort/input force; the force the machine applies to an object is the same as the force you put in. It doesn't help you by making you stronger
-
k.
scissors___ramp___single fixed pulley____ pry bar____ bicycle____ shovel____
-
l.
composed of 2 or more SM
-
m.
1
-
n.
both amounts of work are the same due to the axles being the same. the 100 would be easier as it travels a greater distance
-
o.
false; they only change the direction and force
-
p.
the force needed would increase
-
q.
the wedge moves
-
r.
less
-
s.
more with friction
-
t.
axle with a diameter of 10 cm using a 100 cm wheel
-
u.
fulcrum
-
v.
completing the same goal using a smaller space
-
w.
wheel; axle
-
x.
look in the middle and be FRE; fulcrum in middle=class 1, resistance in middle = 2; effort in the middle = class 3
-
y.
the distance of the string you pull is much greater than the distance the object is lifted; trading increased distance for decreased force.
-
z.
false; the 3rd class lever does not make work easier; They give you increased speed
-
aa.
2
-
ab.
When you increase the distance, you decrease the force (makes work easier)
-
ac.
single movable, single fixed, block and tackle
-
ad.
separates the material
Science Lever and Pulley/ Wedge
(Answer Key)
Created by ftbrady
Instructions:
-
u
1.
the fixed point which a lever turns on is called
-
i
2.
other than multiplying a force, what else can levers do
-
x
3.
how would you determine what class a lever is
-
d
4.
what happens to the force needed to move an object as you increase the length of effort arm
-
p
5.
what would happen to the force required if you decreased the length of the effort arm?
-
z
6.
ALL LEVERS make work easier
-
f
7.
pulleys can_____ a force or change is ______
-
}
8.
3 types of pulleys
-
g
9.
how do you find the mechanical advantage of a block and tackle
-
o
10.
ALL PULLEYS make work easier
-
y
11.
how does the distance of the string you pull compare to the distance the weight if lifted when using a block and tackle system
-
m
12.
what is the MA of a single fixed pulley?
-
{
13.
what is the MA of a single moveable pulley
-
l
14.
what makes something a compound machine instead of a SM
-
k
15.
label each machine S simple or C compound
-
a
16.
list 3 of your own examples of CM
-
h
17.
mechanical advantage is how much the machine _____ your force
-
j
18.
what does it mean about a machine if it has a mechanical advantage of 1
-
r
19.
would machines with higher mechanical advantage take more or less effort force to make some move
-
s
20.
would machines with higher mechanical advantage take more or less work to make something move
-
b
21.
if you have a choice between a machine with a MA of 4 and a machine with an MA of 6, which machine would it make more sense to use
-
w
22.
objects with larger radius_______, object with smaller radius ________
-
t
23.
what would take less force to turn an axle with a diameter of 10 cm using a 50 cm or a 100 cm wheel
-
e
24.
why would the 100 cm wheel be easier
-
n
25.
what would require the least amount of work to turn axle with diameter of 10 cm using 50 or 100 cm wheel
-
v
26.
what is a specific advantage of using a screw instead of an inclined plane
-
ad
27.
what does the wedge do as it moves into a matereial
-
`q
28.
what is the major difference between the wedge and an inclined plane
-
`c
29.
if you have 2 wedges that are 8 cm on top but A is shorter than B which would require the least amount of force
-
ab
30.
What is the rule for question 29
-
a.
________, ________,____________
-
b.
MA of 6 ; you would not have to use as much effort force
-
c.
B it has a greater distance (length)
-
d.
force needed would decrease as you increase the effort arm
-
e.
it has a larger wheel and when you increase the effort distance, you decrease the effort force needed
-
f.
direction
-
g.
count the sections of rope supporting the weight
-
h.
multipplies
-
i.
change the direction of a force
-
j.
the machine doesn't increase your effort/input force; the force the machine applies to an object is the same as the force you put in. It doesn't help you by making you stronger
-
k.
scissors___ramp___single fixed pulley____ pry bar____ bicycle____ shovel____
-
l.
composed of 2 or more SM
-
m.
1
-
n.
both amounts of work are the same due to the axles being the same. the 100 would be easier as it travels a greater distance
-
o.
false; they only change the direction and force
-
p.
the force needed would increase
-
q.
the wedge moves
-
r.
less
-
s.
more with friction
-
t.
axle with a diameter of 10 cm using a 100 cm wheel
-
u.
fulcrum
-
v.
completing the same goal using a smaller space
-
w.
wheel; axle
-
x.
look in the middle and be FRE; fulcrum in middle=class 1, resistance in middle = 2; effort in the middle = class 3
-
y.
the distance of the string you pull is much greater than the distance the object is lifted; trading increased distance for decreased force.
-
z.
false; the 3rd class lever does not make work easier; They give you increased speed
-
aa.
2
-
ab.
When you increase the distance, you decrease the force (makes work easier)
-
ac.
single movable, single fixed, block and tackle
-
ad.
separates the material