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Unit 1 PS: Forces & Motion

Total questions: 50

Worksheet time: 41mins

Name
Class
Date
1.
If two spheres of different masses, but the same size are dropped at the same time
a)
they will hit the floor at the same time
b)
the larger mass will hit first
c)
the smaller mass will hit first
2.

Velocity and time information for a rightward-moving car are shown.

What is the magnitude (i.e., value) and direction of the acceleration?

a)

10 ms210\ \frac{m}{s^2}

b)

2 ms22\ \frac{m}{s^2}

c)

16 ms216\ \frac{m}{s^2}

d)

8 ms28\ \frac{m}{s^2}

3.

If a ball rolls 30 meters in 5 seconds, what is its velocity?

a)

6 m/s

b)

10 m/s

c)

3 m/s

d)

150 m/s

4.
A golf ball accelerates off a tee at 15m/s2, changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?
a)
750 seconds
b)
35 seconds
c)
0.3 seconds
d)
3.3 seconds
5.

Why does a car accelerate as it round a corner at a constant speed?

a)

Its direction changes

b)

It doesn't

c)

It slows down

d)

It speeds up

6.
Acceleration only takes place when things speed up. 
a)
True
b)
False
7.

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

a)

A car shortly after a stoplight turns green.

b)

A car approaching a red light.

c)

A car with the cruise control set at 30 m/s.

d)

A car turning a curve at a constant speed.

8.
When are you undergoing an acceleration in a car? 
a)
speed up
b)
slow down
c)
make turns
d)
All of the above 
9.

What is the difference between mass and weight?

a)

mass is how much matter is in an object, and weight is the gravitational pull on that object

b)

mass and weight are the same

c)

weight affects how much mass is in an object

d)

weight is determined by how many atoms make up an object

10.

The unit of measurement for force is

a)

meter

b)

Newton

c)

Kilogram

d)

Joule

11.
Why would you weigh less on the moon compared to Earth?
a)
less air
b)
less sunlight
c)
more gravitational pull
d)
less gravitational pull
12.

How do you calculate force of gravity?

a)

Fg = m/g

b)

Fg= m+g

c)

Fg= m

d)

Fg= m*g

13.

What is a normal force?

a)

It always opposes gravity. The same as a frictional force.

b)

It is equivalent to the weight of an object.

c)

It is a contact force supporting from the surface below.

d)

It is equivalent to mass.

14.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
15.

What is Newton's 2nd Law?

a)

Every action has an equal and opposite reaction

b)

An object at rest stays at rest, an object in motion stays in motion.

c)

F = ma

d)

Friction

16.

If the man pushes with an equal amount of force, which object will accelerate more?

a)

Car because it has more mass

b)

Lawnmower because it has less mass

c)

Car because it has less mass

d)

Lawnmower because it has more mass

17.
Why would one ball accelerate more than the other when pushed with the same amount of force?
a)
Different weights
b)
Different forces
c)
Different masses
d)
Different sizes
18.

According to Newton's second Law, which would take more force to slow down?

a)

The silver car

b)

The green car

c)

They would both take the same force

19.

True or False: On Earth the velocity of a falling object changes by 10 meters per second each second.

a)

True

b)

False

20.

Select all statements that are true about "acceleration due to gravity."

a)

It is near a constant value on Earth.

b)

It changes value from planet to planet.

c)

It increases as an object falls

d)

It is in the positive direction.

21.

What are the units for acceleration?

a)

Meters

b)

Meters per second

c)

Meters per second squared

d)

Seconds

22.

What is the difference between mass and weight? (Select all that apply)

a)

Nothing, they are different words for the same thing.

b)

Mass is matter. Weight is force due to gravity.

c)

Weight is matter. Mass is force due to gravity.

d)

You can lose mass, but not weight, with exercise.

e)

You can lose weight and mass with exercise.

23.

A push or pull on an object.

a)

Magnitude

b)

Force

c)

Newton

d)

Motion

24.

The combination of all forces acting on an object.

a)

Motion

b)

Newton

c)

Net force

d)

Friction

25.

greatness of size, strength, or importance

a)

magnitude

b)

velocity

c)

Speed

26.

The amount of matter in an object.

a)

Weight

b)

Mass

c)

Speed

d)

Magnitude

27.

A force that opposes motion between two surfaces that are in contact

a)

Gravity

b)

Friction

c)

Mass

d)

Net force

28.
The rate at which the velocity of an object changes over time.
a)
Acceleration
b)
Speed
c)
Direction
d)
Motion
29.

The location of an object.

a)

Force

b)

Motion

c)

Gravity

d)

Position

30.

The standard unit of measurement for velocity.

a)

meters

b)

seconds

c)

meters per second

d)

meters per second squared

31.

What does Δx\Delta x  mean?

a)

change in position

b)

sum of position

c)

duration

d)

position

32.
Before you can solve a problem, the first thing you have to do is _____
a)
define the problem
b)
design your solution
c)
build a protoype
d)
test your solution
33.

What is an Algorithm ?

a)

Well-defined process used for specific calculations or problem-solving

b)

an error in a program that causes unexpected results

c)

Looped or repeated steps in a program

d)

Hardware required to run the software

34.

One day in November, Marisol opened her locker and had to quickly jump back to avoid the cascade of her belongings falling to the floor. “Oh no,” she yelled. “This isn’t cool!” Marisol quickly began to scoop her things back into her locker, but after putting everything away, she was late to her next class. Unfortunately, this wasn’t the first time the locker avalanche had happened. “I’ve got to find a way to organize my locker,” she said to herself. What stage of the Engineering Design Process is this?

a)

Identifying/Defining a Problem

b)

Developing Ideas

c)

Evaluating Ideas

d)

Criteria/Constraint

35.

The combined action of a group of people, especially when effective & efficient.

a)

Constraints

b)

Engineering

c)

Teamwork

d)

Communication

36.

The act of talking, listening, writing, or providing feedback with someone else on your team.

a)

Teamwork

b)

Ethics

c)

Communication

d)

Reflection

37.

Active listening does not require:

a)

Picking up on body language

b)

Interrupting

c)

Summarization

d)

Repeating what you hear back

38.
Assumptions shape our lives but are often beliefs without
a)
Evidence
b)
Feelings
c)
Empathy
d)
Emotions
39.
Often Assumptions are
a)
Unconscious
b)
Conscious
c)
Inherited
d)
Based on facts
40.

Which of the following is NOT the best way to bust assumptions

a)

Testing only one time

b)

Assessing you beliefs and checking your current understanding

c)

Researching from multiple reliable perspectives

d)

Asking questions

41.
Pablo vainly searches for a screwdriver while failing to recognize that a readily available coin in his pocket would turn the screw. His oversight best illustrates: 
a)
functional fixedness.
b)

false assumptions.

c)

algorithms.

d)

heuristics.

42.

What is the NET FORCE of this diagram?

a)

17 N, right

b)

17 N, left

c)

23 N, right

d)

12 N, up

43.

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

a)

the forces are are balanced

b)

the object is free-falling

c)

the object is moving upward

d)

the forces are unbalanced

44.

The Coffee cup in the picture is resting on a table. What force(s) are missing from the free body diagram?

a)

No forces are missing

b)

The normal force from the table pushing the cup up.

c)

The normal force form the table pushing the cup down.

d)

The friction force from the table pushing the cup left and right.

45.

The hockey puck is moving at a constant velocity across the ice. What forces does the puck experience at this moment?

a)

None

b)

Gravity

c)

Gravity and Normal

d)

Gravity, Normal, and Friction

e)

Gravity, Normal, Friction, and Applied

46.

The Car in the picture is moving to the right at a constant velocity. Any force of friction present would be pushing the car to the ...

a)

Up

b)

Right

c)

Down

d)

Left

47.
Match description with free-body diagram.
a)
A book is at rest on a tabletop.
b)
A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling. Diagram the forces acting on the combination of gymnast and bar.
c)
An egg is free-falling from a nest in a tree. Neglect air resistance.
d)
A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance.
48.
Is it BALANCED? 
a)
Yes
b)
No
49.

Which of the following best describes the object in this diagram.

a)

A box sitting on the floor.

b)

A hockey puck gliding to the right.

c)

An athlete running to the right.

d)

A skateboarding gliding to the left.

50.
A box is sliding across a floor while experiencing a frictional force between the box and floor. The box is sliding from left to right. What direction is the force of friction pointing?
a)
up
b)
down
c)
right
d)
left

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