Forces and Motion Test Review

Forces and Motion Test Review

Scalars vs vectors

• Scalars only have magnitude (values - how big it is)

  • distance, speed, time, temperature, mass

• Vectors have magnitude and direction

  • displacement, velocity, acceleration, force

Multiple Choice

What is a scalar?

• A quantity described by direction only

• A quantity described by magnitude only

• A quantity described by both a magnitude and a direction

• A quantity with a magnitude of one

• An empty quantity

Multiple Choice

Which of the following measurements is a scalar measurement?

• Speed

• Velocity

• Force

• Acceleration

• Momentum

Multiple Choice

Which of the following measurements is a vector measurement?

• Volume

• Mass

• Speed

• Temperature

• Velocity

Multiple Choice

Scalar or Vector: The airplane was flying 500 miles per hour due west from New York to California.

• Scalar

• Vector

Multiple Choice

Scalar or Vector: The 5000 pound car was sitting in the last parking space on the block.

• Vector

• Scalar

Multiple Choice

TRUE or FALSE:

A vector quantity always has a direction associated with it.

• TRUE

• FALSE

• How far an object is from its starting point

• in a straight line

• includes direction

Displacement

• scalar

• how far an object has traveled total

• every movement adds to distance

Distance

Distance and Displacement

• rate of change of displacement

• displacement ÷ time

• measured in m/s (should include direction)

Velocity

• rate of change of distance

• distance ÷ time

• measured in meters/sec (m/s)

Speed

Speed and Velocity

Acceleration

• A change in velocity

• can be speeding up, slowing down, or changing direction

• measured in meters per second per second (m/s/s OR m/s²)

Multiple Choice

Scott travels north 5 miles and then goes west 3 miles before coming straight back south 2 miles. What is his distance?

• 10
• 7
• 8
• 6

Multiple Choice

Distance and direction of an object's change in position from a starting point

• displacement
• distance
• motion
• reference point

Multiple Choice

 Jermaine runs exactly 2 laps around a 400 meter track. What is the displacement?

• 800
• 400
• 0
• 200

Multiple Choice

Bill runs 400 meters to Andy's house, turns around, and runs 400 meters back home.  What is Bill's distance?

• 0 meters
• 400 meters
• 800 meters
• 1600 meters

Multiple Choice

Jerry walked from home to school, then from the school to the park. What is his total distance?

• 2 km

• 5 km

• 8 km

• 10 km

Multiple Choice

What is speed?

• how far you go
• how much distance is covered over a period of time
• how fast you accelerate
• the change in the location of a object

Multiple Choice

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

Multiple Choice

Total distance divided by total time is

• average speed
• constant speed
• instantaneous speed
• acceleration

Multiple Choice

What does this graph represent?

• Constant Speed
• Acceleration
• Not moving

Multiple Choice

Which runner won the race?

• A
• B
• C
• It was a tie

Multiple Choice

According to the graph how far does the person travel in the first 5 seconds?

• 2 m
• 10 m
• 0 m
• 5 m

Multiple Choice

What is the person doing from 5 seconds to 10 seconds?

• Walking 
• Running
• Standing Still 
• Walking Fast

Multiple Choice

Velocity is both ____ and _____. 

• speed , direction 
• direction, mass
• volume, density 
• direction, magnitude 

Multiple Choice

Which of the following represents a velocity?

• 40 m
• 40 m north
• 40 m/s
• 40 m/s north

Multiple Choice

What is the speed of a cheetah that travels 112.0 m in 4.0 s?

• 0.0357 m/s

• 30 m/s

• 0.036 m/s

• 28.0 m/s

Multiple Choice

To find acceleration, divide the change in speed by the

• time

• distance

• speed

• velocity

Multiple Select

Which of the following are examples of acceleration?

Choose all that apply.

• A train sitting in the station

• A train pulling out of the station

• A train traveling consistently at 100km/hr on a straight track

• A train going around a curve in the track without changing speed

• A train pulling into a station

Multiple Select

Which of the following is a unit for acceleration?

Choose all that apply.

• km/s

• m/s²

• mi/hr

• ft

• m/s/s

Multiple Choice

Can be measured in meters per second (m/s)

• distance

• speed

• time

• acceleration

Multiple Choice

What is velocity?

• the quickness of an object

• speed in a specific direction

• the location of an object

• acceleration

Multiple Choice

When a car goes around a corner at 20 mph, why do we say it accelerates?

• The car is accelerating because of the velocity is constant

• Cars always accelerate when they are in motion

• The car is accelerating because it's changing direction

• The car accelerates because it's going 20 mph

Multiple Choice

Acceleration is defined as the CHANGE in

• the time it takes for one place to move to another place.

• the distance divided by the time interval.

• the velocity divided by the time.

• the velocity of an object.

Newton's First Law of Motion

• The Law of Inertia

• An object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an unbalanced force

Newton's 2nd Law of Motion

Newton's 3rd Law of Motion

• For every action there is an equal and opposite reaction

• Forces always occur in pairs

• "You push on the wall, the wall pushes back on you."

Multiple Choice

The air is let out of a balloon and it flies around the room. Which of Newton's Laws is this?

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

The floor pushes up as a person's foot pushes down. Which of Newton's Laws is this?

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

A car accelerates faster than a semi-truck. Which of Newton's Laws is this?

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

A person pulls a tablecloth from underneath a plate and it does not move. Which of Newton's Laws is this?

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

As the car moves person so does the driver inside. Which of Newton's Laws is this?

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

Pushing a child on a swing requires less force than pushing an adult. Which of Newton's Laws is this?

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

An ice skater pushes with more force on the ice and moves faster. Which of Newton's Laws is this?

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

A painting hanging on the wall does not move. Which of Newton's Laws is this?

• 1st Law

• 2nd Law

• 3rd Law

Force

• a push or a pull

• can be contact force or field force

• measured in Newtons (N)

• weight

  • F_W=mg

    • g = 10 m/s/s down (really it's 9.8, but you can use 10)

    • m = mass

Force (continued)

• Normal force

  • response to weight on a surface

  • always up

• Friction

  • opposes motion (opposite direction)

  • only on a surface

Multiple Choice

The amount of matter in an object  is _______________?

• Mass
• Weight
• Gravity
• Force

Multiple Choice

An object's mass coupled with the gravitational force is ____________________________________.

• Mass 
• Weight
• Density
• Acceleration

Multiple Choice

The SI unit of weight is named after______________________?

• Thomas Alva Edison
• Sir Issac Newton
• Nikkla Tesla
• Sir Richard Branson

Multiple Choice

A student has a mass of 65 kilograms.  What would be their weight on Earth?

• 650 kilograms

• 650 Newtons

• 6.5 kilograms

• 6.5 Newtons

Multiple Choice

Gravity attracts all objects towards one another.

• False
• True
• It depends

Multiple Choice

The force of gravity acting on an object is the object's ______.

• mass
• matter
• weight 
• friction 

Multiple Choice

What does the F stand for on a free-body diagram?

• Free

• Fan

• Net

• Force

Multiple Choice

What is the NET FORCE of this diagram?

• 17 N, right

• 17 N, left

• 23 N, right

• 12 N, up

Multiple Choice

Which of the following is true about this free-body diagram?

• the forces are are balanced

• the object is free-falling

• the object is moving upward

• the forces are unbalanced

Multiple Choice

8 N to the left , and 4 N to the right. Find the net force. Is this balanced 

• 12 N Right  No
• 4 N Left  No
• 12 N Right  Yes
• 4 N Left  Yes

Multiple Choice

"If we apply a ___________ to an object, its __________________ will change and it will  ______________."

• force, accelerate, gravity
• accelerate, inertia, gravity
• force, velocity, accelerate
• velocity, gravity, inertia

Multiple Choice

It is defined as forces that are equal in magnitude.

• Unbalanced Forces

• Forces

• Balanced Forces

• Net force

Multiple Choice

Use the picture as reference. If the force of the girl pushing is 30N, and the force of the boy who is also pushing is 30N, what is the net force?

• 0N

• 60N

• 900N

• 1N

Multiple Choice

What is the net force?

• 20 N 
• 0 N 
• 400 N 
• 40 N 

Multiple Choice

Name the missing force...

• weight force
• normal force
• applied force
• frictional force

Multiple Choice

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor.

Multiple Choice

A hockey puck glides to the right across the ice at a constant speed.

Multiple Choice

Which freebody diagram best represents a bookbag resting on the classroom floor?

Multiple Choice

Which freebody diagram best represents a desk being pushed across the classroom floor?

Multiple Choice

If this object were moving right, the left-arrow in this diagram is most-likely:

• gravity

• normal

• a push or pull

• friction

Multiple Choice

Whenever an object is moving, there is always this force opposing the motion:

• inertia

• momentum

• friction

• applied force

Multiple Choice

What is the NET FORCE of this diagram?

• 17 N, right

• 17 N, left

• 23 N, right

• 12 N, up