A projectile launched at 20 m/s at an angle of 30o lands on a level surface. How far

away does it land?

40 meters

20 meters

34 meters

9.8 meters

17 meters

0% 0% 0%0%0%

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1. 40 meters2. 20 meters3. 34 meters4. 9.8 meters5. 17 meters

The magnitude of the centripetal acceleration.

ac=v/r2

ac=r/v

ac=v2/r2

ac=v2/r

0% 0%0%0%

0 of 30

1. ac=v/r2

2. ac=r/v

3. ac=v2/r2

4. ac=v2/r

The acceleration of an object in uniform circular motion:

Is ze

ro

Points outw

ard

Points to

the ...

Points in th

e ...

0% 0%0%0%

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1. Is zero2. Points outward3. Points to the center4. Points in the

direction the object is moving

A push or a pull

Acceleration

Pressu

re Fo

rce M

ass

0% 0%0%0%

0 of 30

1. Acceleration2. Pressure3. Force4. Mass

Forces are measured in:

Newto

ns

Kilogra

ms

Pascals

m/s2

0% 0%0%0%

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1. Newtons2. Kilograms3. Pascals4. m/s2

On earth the force of gravity acting on a 4.5 kg object is

0.45 N 4.5 kg

45 N 450 N

0% 0%0%0%

1. 0.45 N2. 4.5 kg3. 45 N4. 450 N

0 of 30

What is the mass of an 18 kg object on earth?

1.8 kg 1.8 N

18 kg 180 N

0% 0%0%0%

0 of 30

1. 1.8 kg2. 1.8 N3. 18 kg4. 180 N

If a 2.0 kg textbook were taken to the moon its mass there would be:

Significa

ntly sm

aller t

ha... Zero

Still 2

.0 kg

Significa

ntly la

rger t

han...

0% 0%0%0%

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1. Significantly smaller than on earth.

2. Zero3. Still 2.0 kg4. Significantly larger

than on earth

Which of the following is NOT a fundamental force of nature?

Weak N

uclear F

...

Electr

omagneti...

Fricti

on Force

Grav

itational ..

.

0% 0%0%0%

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1. Weak Nuclear Force2. Electromagnetic

Force3. Friction Force4. Gravitational force

Newton’s first law states:

Moving th

ings ...

Constant v

eloc...

This go in

a s...

0% 0%0%

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1. Moving things tend to slow down and stop if not acted on by a force.

2. Constant velocity motion is only possible if no forces act on an object.

3. This go in a straight line at constant speed when the net force is zero.

Tendency of an object to continue moving like it already was.

Densit

y

Power Fo

rce

Inerti

a

0% 0%0%0%

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1. Density2. Power3. Force4. Inertia

Things have more inertia if they have a greater:

Densit

y

Volume M

ass

Free fa

ll acce

...

0% 0%0%0%

0 of 30

1. Density2. Volume3. Mass4. Free fall

acceleration

Micro (m)

x10-9

x10-6

x10+3

x10+12

0% 0%0%0%

0 of 30

1. x10-9

2. x10-6

3. x10+3

4. x10+12

A ball is thrown straight up. At its highest point its velocity is ____ and its

acceleration is _____

0, 0

0, 10 m

/s2 dow...

10 m/s,

0

10 m/s,

10 m/s

...

0% 0%0%0%

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1. 0, 02. 0, 10 m/s2 down3. 10 m/s, 04. 10 m/s, 10 m/s2 up

A 5.0 kg object experiences a forward force of 20.0 N and a backwards force of 5 N. The net force is:

50 N 25 N

75 N 15 N

0% 0%0%0%

0 of 30

1. 50 N2. 25 N3. 75 N4. 15 N

A 5.0 kg object experiences a forward force of 20.0 N and a backwards force of 5 N. The acceleration is:

9.8 m/s2

5.0 m/s2

3.0 m/s2

0.67 m/s2

0% 0%0%0%

0 of 30

1. 9.8 m/s2

2. 5.0 m/s2

3. 3.0 m/s2

4. 0.67 m/s2

If the frictional force is 40 N and the normal force is 200 N the frictional coefficient is:

5. .5 .4 .2

0% 0%0%0%

0 of 30

1. 5.02. 0.53. 0.44. 0.2

A horizontal force of 35 N causes a 2.0 kg object to accelerate at 2.5 m/s2 across the

floor. The net force is____.

35 N 20 N

5.0 N 0.0 N

0% 0%0%0%

0 of 30

1. 35 N2. 20 N3. 5.0 N4. 0.0 N

A horizontal force of 35 N causes a 2.0 kg object to accelerate at 2.5 m/s2 across the

floor. The frictional force is____.

35 N 30 N

10 N 0 N

0% 0%0%0%

0 of 30

1. 35 N2. 30 N3. 10 N4. 0 N

A horizontal force of 35 N causes a 2.0 kg object to accelerate at 2.5 m/s2 across the floor. The

coefficient of friction is____.

0 of 301.5 .67 .2 .1

0% 0%0%0%

1. 1.52. 0.673. 0.204. 0.10

On earth 1.0 kg weighs

2.2 lbs

0.1 N 1.0 kg

2.54 lbs

0% 0%0%0%

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1. 2.2 lbs2. 0.1 N3. 1.0 kg4. 2.54 lbs

If 2.0 kg weighs 8.0 N on the surface of a planet, the acceleration of a dropped object would be:

10 m/s2

Depends o

n the...

16 m/s2

4.0 m/s2

0% 0%0%0%

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1. 10 m/s2

2. Depends on the mass

3. 16 m/s2

4. 4.0 m/s2

Equal to kg m/s∙ 2.

Lite

rs M

ph

Newto

ns

Watts

0% 0%0%0%

0 of 30

1. Liters2. Mph3. Newtons4. Watts

If a 140 kg football player collides with an opponent who is only 60 kg which player exerts a larger force?

The 140 kg pla...

The 60 kg play...

The force

s are

...

0% 0%0%

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1. The 140 kg player2. The 60 kg player3. The forces are equal

in magnitude

An object will fall at constant speed

Once

air resis

...

Only on th

e mo...

Only if

it has..

.

Only if

there

...

0% 0%0%0%

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1. Once air resistance exerts a force equal to the weight of the object

2. Only on the moon3. Only if it has a

parachute or a propeller.

4. Only if there is no gravity

A 6.0 kg object traveling at 5.0 m/s strikes a 2.0 kg object that is initially at rest. What is the

total momentum following the collision?

11 kg m

/s

75 kg m

/s

30 kg m

/s

Can not be det..

.

0% 0%0%0%

0 of 30

1. 11 kg m/s 2. 75 kg m/s 3. 30 kg m/s 4. Can not be

determined

A solid block of metal measures 5 cm x 6 cm x 10 cm and has a mass of 1.8 kg. The density of the metal is:

3.0 g/cm

3

300 g/cm

3

6.0 g/cm

3

1.0 g/cm

3

0% 0%0%0%

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1. 3.0 g/cm3

2. 300 g/cm3

3. 6.0 g/cm3

4. 1.0 g/cm3

Kepler determined that planets travel in ________ orbits.

Circular

Ellip

tical

Parabolic

Linear

0% 0%0%0%

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1. Circular2. Elliptical3. Parabolic4. Linear

Demonstrated that objects on earth experience a gravitational attraction?

Kepler

Newto

n

Galile

o

Cavendish

0% 0%0%0%

0 of 30

1. Kepler2. Newton3. Galileo4. Cavendish

Formulated three laws of planetary motion:

Galile

o

Einste

in

Kepler

Newto

n

0% 0%0%0%

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1. Galileo2. Einstein3. Kepler4. Newton

What is the acceleration of a car going around a 100 m radius turn at a constant speed of 20 m/s?

0 m/s

2

10 m/s2

0.20 m/2

4.0 m/s2

0% 0%0%0%

0 of 30

1. 0 m/s2

2. 10 m/s2

3. 0.20 m/2

4. 4.0 m/s2

A 6.0 kg object traveling at 5.0 m/s strikes a 2.0 kg object that is initially at rest. If the objects

stick together, what is their speed following the collision?

5.0 m/s

3.75 m/s

2.5 m/s

0.0 m/s

0% 0%0%0%

1. 5.0 m/s2. 3.75 m/s3. 2.5 m/s4. 0.0 m/s

0 of 30

A ball that is thrown straight up at 20 m/s reaches a maximum height of

10 m 20 m

40 m 80 m

0% 0%0%0%

0 of 30

1. 10 m2. 20 m3. 40 m4. 80 m

What is the momentum of a 6.0 kg object traveling at 5.0 m/s?

11 kg m

/s

75 kg m

/s

30 kg m

/s

1.2 kg m

/s

0% 0%0%0%

0 of 30

1. 11 kg m/s2. 75 kg m/s3. 30 kg m/s4. 1.2 kg m/s