NEW
Font size
S
M
L
XL
WorksheetsFluids and motion
Total questions: 10
Worksheet time: 50mins
Name
Class
Date
1.
Bernoulli's principle states that the pressure in a fluid ____________as the fluid's velocity _____________
a)
decreases, decreases
b)
increases, increases
c)
decreases, increases
d)
goes up, goes up
2.
A table-tennis ball is attached to a string and swung into a stream of water. Instead of being pushed out of the water, the ball is held in the water. Why?
a)
the moving water has a high pressure
b)
the moving water attracts the ball
c)
the water has a lower pressure than the surrounding air
d)
static electricity builds up on the ball
3.
Air flowing over an aircraft wing
a)
Goes faster on the upper surface than the lower surface
b)
Creates a lot of drag
c)
Leads to low pressure above the wing
d)
Goes slower on the upper surface than the lower surface
4.
The lift force on an aircraft wing acts against
a)
drag
b)
friction
c)
thrust
d)
gravity
5.
As an aircraft flies along, increasing thrust leads to
a)
a decrease in drag
b)
an increase in lift
c)
a decrease in speed
d)
a decrease in lift
6.
A glider has bigger wings than a jet, because a glider has
a)
more drag
b)
less thrust
c)
lower lift
d)
two engines instead of four
7.
An irregular or unpredictable flow of fluid is known as
a)
turbulence
b)
opulence
c)
flatulence
d)
arquebus
8.
A sudden increase in turbulence during an airplane flight will cause
a)
increased thrust
b)
decreased lift
c)
rise in velocity
d)
the plane to rise up
9.
The blue colored option is
a)
this one
b)
this one
c)
this one
d)
this one
10.
A humming bird must flap its wings more often than a swan, because the humming bird
a)
eats nectar
b)
doesn't know the words
c)
has smaller wings
d)
has a faster heart rate
Reset
