PhySci Final Review 1: Motion

PhySci Review for Final

By William Lovering

The Metric System

The metric system was designed as a way to standardize measurement and make conversions easier.

Before metrics units of measure many units were based off of body parts and so they commonly changed.

Standards were placed in city centers to compare to and often could be changed to short change peasants.

Newton's First Law

• An object in motion tends to stay in motion unless acted upon by an unbalanced force.

• An object at rest tends to stay at rest unless acted upon my an unbalanced force.

• The first law is often called the law of inertia.

• Inertia means that an object usually resist a change in motion. The more mass an object has, the more inertia it has. For example, a train has more inertia than feather.

Newton's Second Law

• F= m * a

• m=F/a

• a = F/m

• The more mass an object has, the more force is needed to accelerate it. The more force you apply, the more it will accelerate. There are a lot of applications of Newton's Second Law.

Multiple Choice

1 m = ________ cm

• 10
• 100
• 1,000
• 10,000

Multiple Choice

A mass of 27.4 grams would be an example of 

• qualitative data

• quantitative data

Multiple Choice

Which of the following units would NOT be used to measure distance?

• meters

• centimeters

• millimeters

• kilograms

Multiple Choice

What is the mass (in grams) pictured on this triple beam balance?

• 3.5

• 206.5

• 200

• 263.5

Multiple Choice

Which of the following would best represent the volume of the liquid in this graduated cylinder?

• 20.6

• 25.8

• 25

• 0.6

Multiple Choice

On a distance vs. time graph, the steeper the slope _____

• the slower the speed
• the faster the speed
• less acceleration
• greater acceleration

Multiple Choice

What is velocity?

• the quickness of an object
• the location of an object
• acceleration
• speed in a specific direction

Multiple Choice

Speed is different from velocity because

• Velocity has a direction
• Speed uses Distance /Time
• Velocity doesn't include time
• Velocity doesn't include distance

Multiple Choice

The speedometer on your car tells you

• average velocity
• instantaneous velocity
• average speed
• instantaneous speed

Multiple Choice

An old lady rolls down a hill at 3 meters/second. The hill is 36 meters long. How many seconds does it take the old lady to reach the bottom of the hill?

• 39 seconds

• 12 seconds

• 15 seconds

• 33 seconds

Multiple Choice

What is the average speed of a cheetah that sprints 100 m in 4 s?

• 25 m/s

• 0.04 m/s

• 25 s

• 104 m/s

Multiple Choice

What is a difference between distance and displacement

• Distance is measured in seconds and displacement is measured in meters

• Distance is always shorter than displacement

• Displacement can be equal to zero if the object ends in the place it began in

• Distance can be equal to infinite when only a small distance has been travelled

Multiple Choice

This occurs when an object speeds up, slows down, or changes direction.

• Speed

• Velocity

• Acceleration

Multiple Choice

In each of the following cases, determine where the car has no acceleration?

• A car speeds up after a stoplight turns green.

• A car slows down as it approaches a red light

• A car with the cruise control set at 80 km/h going down a straight highway

• A car turning a curve at a constant speed

Multiple Choice

The SI unit for acceleration is

• mph

• ft/sec

• m/s²

• m/s

Multiple Choice

A roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds.  What's the acceleration?

• 24 m/s²
• 18 m/s²
• 16 m/s²
• 16 m/s

Multiple Choice

An object and rest will stay at rest and an object in motion will stay in motion unless acted on by a force, is which one of Newton's Laws of Motion?

• 4th Law of Motion

• 1st Law of Motion

• 3rd Law of Motion

• 2nd Law of Motion

Multiple Choice

The force that pulls objects towards Earth.

• Gravity
• Friction
• Inertia
• Force

Multiple Choice

For every action, thereʼs an equal and opposite reaction. *Action-Reaction*

• Newton's First Law
• Newton's Second Law
• Newton's Third Law
• force

Multiple Choice

 What is the unit called that measures force?

• Isaac
• Yee
• Newton
• kilogram

Multiple Select

A push or pull on an object, causing it to move, stop, or change direction.

• motion

• gravity

• force

• inertia

Multiple Select

A force that slows down an object when it rubs against another object.

• gravity

• velocity

• inertia

• friction

Multiple Select

An object's resistance to any change in motion.

• inertia

• velocity

• speed

• friction

Multiple Choice

Equal forces that do not cause a change in an objects motion

• Unbalance force

• Push or a pull

• Balanced force

• Average speed

Multiple Choice

Which type of force(s) will cause a change in an object's motion?

• gravity
• zero net force
• balanced forces
• unbalanced forces

Multiple Choice

If a force of 50 Newton's was applied to an object with a mass of 0.5 kilograms, what will the object's acceleration be?

• 10 m/s²

• 0.1 m/s²

• 100 m/s²

• 1 m/s²

Multiple Choice

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Multiple Choice

Which of the following objects has the least acceleration?

• a. an empty shopping cart pushed with a hard force
• b. a full shopping cart pushed with a hard force
• c. an empty shopping cart pushed with a light force
• d. a full shopping cart pushed with a light force

Multiple Choice

What is the net force?

• 17N Left

• 3 N, right

• 10N Right

• 3N Left

Multiple Choice

If an object is not moving the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!

Multiple Choice

What is the acceleration of an object that has a mass of 5 g and is hit with a force of 10 N?

• 50 m/s²

• 2 m/s²

• 15 m/s²

• 5 m/s²

Multiple Choice

A force of 90N is applied to each cart below, which one will accelerate the fastest?

• Cart 1
• Cart 2
• Cart 3 
• Cart 4

Multiple Choice

While driving down the road, a firefly strikes the windshield of a bus and makes a quite obvious mess in front of the face of the driver. The firefly hit the bus and the bus hits the firefly. Which of the two forces is greater: the force on the firefly or the force on the bus?

• Firefly

• Bus

• Equal Forces