Unit 4 Test 1 Question Preview (ID: 28160)


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The actual mechanical advantage of a machine _______.
a) cannot be less than one.
b) decreases as the input (effort) distance increases.
c) increases with greater friction.
d) is less than the ideal mechanical advantage of the machine.

A rod attached to the center of a wheel is called:
a) a magnet
b) a wedge
c) a top
d) an axle

This is the same as an inclined plane:
a) wheel
b) ramp
c) pulley
d) swing

This force pulls us toward the center of the earth.
a) gravity
b) air resistance
c) friction
d) push

This is necessary to get something moving.
a) resistance
b) force
c) wedge
d) screw

Pick the one that is not an example of a way objects move.
a) roll
b) flip
c) spin
d) sit

Which of these is a type of force?
a) push
b) friction
c) wedge
d) magnet

Which is not a simple machine?
a) pulley
b) wedge
c) incline plane
d) computer

An example of a balanced force is
a) a car sliding on ice
b) a tug-of-war game in which no one wins
c) a car hitting a telephone pole
d) a roller coaster going down the first drop.

In physical science, a push or a pull is called a(n) _______.
a) gravity
b) force
c) universal law
d) inertia

When two equal forces act on the same object in opposite directions, the net force is ____.
a) crazy
b) greater than either force
c) zero
d) smaller than either choice

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) First law- Once in motion.....
b) second law- Mass x acceleration = ...
c) third law- For every action there is an....
d)

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) second law- Mass x acceleration = ...
c) third law- For every action there is an....
d)

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) second law- Mass x acceleration = ...
c) third law- For every action there is an....
d)

A simple machine is:
a) a tool that makes work easier.
b) a tool with many moving parts
c) a force of attraction
d) the measurement from top to bottom of an object

A seesaw is an example of a:
a) wheel and axle
b) pulley
c) lever
d) screw

An example of an unbalanced force (net force) is
a) a car parked in the garage
b) a tug-of-war game in which no one wins
c) a bridge
d) a roller coaster going down the first drop.

According to Newtons first law of motion, a moving object that is not acted on by an unbalanced force will
a) remain in motion
b) eventually come to a stop
c) change its momentum
d) accelerate

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 first law of motion from objects at rest
b) Newtons first law of motion for objects in motion
c) Newtons second law of motion
d) Newtons third law of motion

A sled sliding on a flat, icy surface with a constant velocity is best described by
a) Newtons first law of motion from objects at rest
b) Newtons first law of motion for objects in motion
c) Newtons second law of motion
d) Newtons third law of motion

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