Physics review

Question 1

According to the graph above, during which interval does the cat have the greatest positive velocity?

Answer 1

Section A

Question 2

What is described by the definition, “the rate of change of velocity?”

Answer 2

acceleration

Question 3

If two objects of different masses were dropped on Earth but in a chamber where there is no air resistance (a vacuum) would they hit the ground at different times or the same time?

Answer 3

The same time because gravity is bigger than the objects.

Question 4

A chihuahua had a mass of 3 kg. What is its weight on the planet Earth?

Answer 4

-30 N

Question 5

A Dauschund was pulling with a force of 10 N on a tablecloth angled at 25 degrees from the floor. What was the vertical component of the force it was applying?

Answer 5

4.22 N

Question 6

The acceleration due to gravity on Earth is -9.81 m/s 2. In what direction is this acceleration applied?

Answer 6

Vertically downward

Question 7

A vase is pushed from a 1 m tall table on Earth with a horizontal speed of 1m/s. It fell from rest vertically, how far from the edge of the table did it land?

Answer 7

.44m

Question 8

200 N was used to accelerate an armchair by 2 m/s. What is the mass of the armchair?

Answer 8

100 kg

Question 9

On Earth, a rubber band shot a paper football at an angle of 38 degrees from a table. At that angle, its velocity was 3 m/s. How long did the paper football take t reach its maximum height?

Answer 9

-1.85

Question 10

The symbol mm represents

Answer 10

millimeters

Question 11

If you know the acceleration of a car, its initial velocity, and the time it takes to travel, what other value about its motion can you calculate?

Answer 11

distance

Question 12

When a car’s velocity slows is positive and its acceleration is negative, what is happening to the car’s motion?

Answer 12

The car slows down.

Question 13

You have been injured in the laboratory. First, you should

Answer 13

Tell your instructor

Question 14

Identify the following quantities as scalar or vector: the mass of an object, the number of leaves on a tree, wind velocity.

Answer 14

Mass of an object is scalar. number of leaves on a tree is vector, tree is scalar

Question 15

You can keep a book from from falling to the ground by placing it on a horizontal service. What is the reaction force called that is resisting the force of a book on the surface?

Answer 15

gravity

Question 16

car/ trash picture

Answer 16

c.

Question 17

A 100 N table rests on a level floor. What is the weight of the table?

Answer 17

100

Question 18

Continue to consider the 100 N table. What i the normal force between the table and the floor?

Answer 18

100

Question 19

A 50 N vacuum cleaner was pushed across the floor. What was the force of friction against the vacuum cleaner’s motion?

Answer 19

20

Question 20

The most appropriate SI unit for measuring the length of an automobile is the

Answer 20

meter/m

Question 21

box image This box will increase in speed

Answer 21

A.

Question 22

How many meters are in a kilometer?

Answer 22

1,000 meters

Question 23

How many centimeters are in each meter?

Answer 23

100 centimeters

Question 24

How many centimeters are in a kilometer?

Answer 24

100,000 centimeters

Question 25

What does the lab partner observe during the instant the student pushes off?

Answer 25

B.

Question 26

Name a vector quantity.

Answer 26

The ice cream cone can go left.

Question 27

Name a scalar quantity.

Answer 27

The donut does not have any direction.

Question 28

The slope of a velocity versus time graph is equal to

Answer 28

acceleration

Question 29

The SI base unit to measure mass is the

Answer 29

kilogram/kg

Question 30

The SI base unit for time is the

Answer 30

second/s

Question 31

The slope of a displacement versus time graph is equal to

Answer 31

the velocity of the body