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Unit 4 Test 1
Test Description: Test
Instructions: Answer all questions to get your test result.
1) The actual mechanical advantage of a machine _______.
A
decreases as the input (effort) distance increases.
B
increases with greater friction.
C
cannot be less than one.
D
is less than the ideal mechanical advantage of the machine.
2) A rod attached to the center of a wheel is called:
A
an axle
B
a top
C
a magnet
D
a wedge
3) This is the same as an inclined plane:
A
wheel
B
ramp
C
swing
D
pulley
4) This force pulls us toward the center of the earth.
A
push
B
friction
C
air resistance
D
gravity
5) This is necessary to get something moving.
A
force
B
wedge
C
resistance
D
screw
6) Pick the one that is not an example of a way objects move.
A
spin
B
flip
C
roll
D
sit
7) Which of these is a type of force?
A
friction
B
magnet
C
push
D
wedge
8) Which is not a simple machine?
A
incline plane
B
computer
C
wedge
D
pulley
9) An example of a balanced force is
A
a car sliding on ice
B
a roller coaster going down the first drop.
C
a tug-of-war game in which no one wins
D
a car hitting a telephone pole
10) In physical science, a push or a pull is called a(n) _______.
A
gravity
B
universal law
C
inertia
D
force
11) When two equal forces act on the same object in opposite directions, the net force is ____.
A
crazy
B
zero
C
smaller than either choice
D
greater than either force
12) Which of newtons laws would allow a passenger to fly right out of his seat if he didnt have a lap belt over him and the roller coaster suddenly stopped?
A
second law- Mass x acceleration = ...
B
third law- For every action there is an....
C
First law- Once in motion.....
13) Your body bouncing back into your seat after hitting the lap bar is an example of which of Newtons Laws in action?
A
First law- Once in motion.....
B
third law- For every action there is an....
C
second law- Mass x acceleration = ...
14) The amount of force of the passenger as he hits the lap bar is an example of which of Newtons Laws in action?
A
First law- Once in motion.....
B
third law- For every action there is an....
C
second law- Mass x acceleration = ...
15) A simple machine is:
A
the measurement from top to bottom of an object
B
a tool that makes work easier.
C
a tool with many moving parts
D
a force of attraction
16) A seesaw is an example of a:
A
pulley
B
screw
C
lever
D
wheel and axle
17) An example of an unbalanced force (net force) is
A
a tug-of-war game in which no one wins
B
a car parked in the garage
C
a roller coaster going down the first drop.
D
a bridge
18) According to Newtons first law of motion, a moving object that is not acted on by an unbalanced force will
A
eventually come to a stop
B
accelerate
C
remain in motion
D
change its momentum
19) An ice skater at rest pushes against a sled at rest, causing both the skater and sled to move away from each other with different accelerations. This is an example best described by
A
Newtons third law of motion
B
Newtons first law of motion for objects in motion
C
Newtons second law of motion
D
Newtons first law of motion from objects at rest
20) A sled sliding on a flat, icy surface with a constant velocity is best described by
A
Newtons first law of motion for objects in motion
B
Newtons second law of motion
C
Newtons first law of motion from objects at rest
D
Newtons third law of motion
*select an answer for all questions
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