Question 1

In the equation ac= v2/r for centripetal acceleration,the v stands for

Accepted Answer

A)  volume. 
B)  very. 
C)  speed. 
D)  velociraptor. 
A)  volume. 
B)  very. 
C)  speed. 
D)  velociraptor.

Question 2

An object is dropped (g = 9.80 m/s2)and falls for 5.00 s before hitting the ground.
a. How far has the object fallen?
b. What is the final velocity?
c. What is the final acceleration?

Accepted Answer

a.123 m
b.

Question 3

If the speed of an object in circular motion is increased by a factor of 3,its centripetal acceleration for the same radius will be multiplied by a factor of

Accepted Answer

A)  0.111. 
B)  0.333. 
C)  1.73. 
D)  9. 
E)  3. 
A)  0.111. 
B)  0.333. 
C)  1.73. 
D)  9. 
E)  3.

Question 4

An object that is moving in a linear path with an acceleration in the direction opposite to the motion has a(n)______________ velocity.

Accepted Answer

A)  constant 
B)  increasing 
C)  decreasing 
D)  none of these 
A)  constant 
B)  increasing 
C)  decreasing 
D)  none of these

Question 5

An automobile traveling on a straight,level road at 25 km/h speeds up to 70 km/h in 20 s.What was the magnitude of the auto's acceleration,in meters per second squared?

Accepted Answer

The answer of An automobile traveling on a straight,level road...

Question 6

In the equation ac= v2/r for centripetal acceleration,the r stands for

Accepted Answer

A)  diameter. 
B)  distance. 
C)  radius. 
D)  rate. 
A)  diameter. 
B)  distance. 
C)  radius. 
D)  rate.

Question 7

Physics deals with matter,motion,force,and ______________.

Accepted Answer

The answer of Physics deals with matter,motion,force,and ______________....

Question 8

The SI unit of centripetal acceleration is ______________.

Accepted Answer

meters per

Question 9

An automobile's acceleration cannot be changed by using the

Accepted Answer

A)  gas pedal. 
B)  brake pedal. 
C)  steering wheel. 
D)  stick shift. 
E)  turn signal. 
A)  gas pedal. 
B)  brake pedal. 
C)  steering wheel. 
D)  stick shift. 
E)  turn signal.

Question 10

The magnitude of the acceleration of an object moving in a circle at constant speed is

Accepted Answer

A)  inversely proportional to the speed squared. 
B)  inversely proportional to the speed. 
C)  inversely proportional to the radius of the circle squared. 
D)  inversely proportional to the radius of the circle. 
A)  inversely proportional to the speed squared. 
B)  inversely proportional to the speed. 
C)  inversely proportional to the radius of the circle squared. 
D)  inversely proportional to the radius of the circle.

Question 11

Centripetal means

Accepted Answer

A)  center seeking 
B)  pulls outward 
C)  constant 
D)  fast 
E)  none of these 
A)  center seeking 
B)  pulls outward 
C)  constant 
D)  fast 
E)  none of these

Question 12

A golfer hits a ball on a level fairway at an angle of 60° relative to the horizontal,and it lands on the green.Another golfer hits a ball with the same speed but at another angle,and it lands on the green by the other ball.What was the launch angle for the second golfer?

Accepted Answer

A)  30° 
B)  20° 
C)  45° 
D)  40° 
E)  10° 
A)  30° 
B)  20° 
C)  45° 
D)  40° 
E)  10°

Question 13

Average speed multiplied by time gives

Accepted Answer

A)  average acceleration. 
B)  displacement. 
C)  instantaneous speed. 
D)  distance. 
A)  average acceleration. 
B)  displacement. 
C)  instantaneous speed. 
D)  distance.

Question 14

Displacement divided by time gives

Accepted Answer

A)  average acceleration. 
B)  average velocity. 
C)  average speed. 
D)  average distance. 
A)  average acceleration. 
B)  average velocity. 
C)  average speed. 
D)  average distance.

Question 15

The distance traveled by an automobile moving at a constant velocity is

Accepted Answer

A)  directly proportional to the time. 
B)  directly proportional to the time squared. 
C)  inversely proportional to the time squared. 
D)  inversely proportional to the time. 
E)  none of these 
A)  directly proportional to the time. 
B)  directly proportional to the time squared. 
C)  inversely proportional to the time squared. 
D)  inversely proportional to the time. 
E)  none of these

Question 16

A ball dropped from the top of a building hits the ground 9.0 s later.How high is the building (in meters)?

Accepted Answer

400 m (rou

Question 17

If an object has a constant velocity,then its acceleration is ______________.

Accepted Answer

The answer of If an object has a constant velocity,then...

Question 18

If an object moves with constant velocity,

Accepted Answer

A)  its speed is constant. 
B)  its direction is constant. 
C)  its average speed is constant. 
D)  its distance traveled per unit time is constant. 
E)  all of these 
A)  its speed is constant. 
B)  its direction is constant. 
C)  its average speed is constant. 
D)  its distance traveled per unit time is constant. 
E)  all of these

Question 19

A student travels from St.Louis to Indianapolis,a distance of 210 mi,in 6.0 h.The return trip over the same route takes 7.0 h.What is the average speed for
a. the first half of the trip?
b. the second half of the trip?
c. the total trip?

Accepted Answer

a.35 mi/h

Question 20

Under ideal conditions,a projectile with a given initial speed at an angle of 15° has the same range as a projectile at an angle of ______________ with the same initial speed.

Accepted Answer

The answer of Under ideal conditions,a projectile with a given...

Exam 2: Motion

In the equation ac= v2/r for centripetal acceleration,the v stands for

An object is dropped (g = 9.80 m/s2)and falls for 5.00 s before hitting the ground. a. How far has the object fallen? b. What is the final velocity? c. What is the final acceleration?

If the speed of an object in circular motion is increased by a factor of 3,its centripetal acceleration for the same radius will be multiplied by a factor of

An object that is moving in a linear path with an acceleration in the direction opposite to the motion has a(n)______________ velocity.

An automobile traveling on a straight,level road at 25 km/h speeds up to 70 km/h in 20 s.What was the magnitude of the auto's acceleration,in meters per second squared?

In the equation ac= v2/r for centripetal acceleration,the r stands for

Physics deals with matter,motion,force,and ______________.

The SI unit of centripetal acceleration is ______________.

An automobile's acceleration cannot be changed by using the

The magnitude of the acceleration of an object moving in a circle at constant speed is

Centripetal means

A golfer hits a ball on a level fairway at an angle of 60° relative to the horizontal,and it lands on the green.Another golfer hits a ball with the same speed but at another angle,and it lands on the green by the other ball.What was the launch angle for the second golfer?

Average speed multiplied by time gives

Displacement divided by time gives

The distance traveled by an automobile moving at a constant velocity is

A ball dropped from the top of a building hits the ground 9.0 s later.How high is the building (in meters)?

If an object has a constant velocity,then its acceleration is ______________.

If an object moves with constant velocity,

A student travels from St.Louis to Indianapolis,a distance of 210 mi,in 6.0 h.The return trip over the same route takes 7.0 h.What is the average speed for a. the first half of the trip? b. the second half of the trip? c. the total trip?

Under ideal conditions,a projectile with a given initial speed at an angle of 15° has the same range as a projectile at an angle of ______________ with the same initial speed.

Measurement

Force and Motion

Work and Energy

Temperature and Heat

Waves and Sound

Optics and Wave Effects

Electricity and Magnetism

Atomic Physics

Nuclear Physics

The Chemical Elements

Chemical Bonding

Chemical Reactions

Organic Chemistry

Place and Time

The Solar System

Moons and Small Solar System Bodies

The Universe

The Atmosphere

Atmospheric Effects

Structural G Eology and P Late Tectonics

Minerals, rocks, and Volcanoes

Surface Processes

Geologic Time

Filters

In the equation a_c= v²/r for centripetal acceleration,the v stands for

An object is dropped (g = 9.80 m/s²)and falls for 5.00 s before hitting the ground. a. How far has the object fallen? b. What is the final velocity? c. What is the final acceleration?

In the equation a_c= v²/r for centripetal acceleration,the r stands for