9 Wks Test

Front 1

if you ride your bicycle down a straight road for 500 m then turn around and ride back, your distance is ____ your displacement

Back 1

greater than

Front 2

motion is a change in ____

Back 2

position

Front 3

the speed you read in your speedometer is _____

Back 3

instantaneous speed

Front 4

3 m/s north is an example of a(n)

Back 4

velocity

Front 5

the relationship among speed, distance, and time is ___

Back 5

s= d/t

Front 6

a single point on a distance-time graph tells the ___

Back 6

instantaneous speed

Front 7

a merry go round horse moves at a constant speed but at a changing ___

Back 7

velocity

Front 8

acceleration us rate or change of ____

Back 8

velocity

Front 9

if you ride your bike up a hill, then ride down the other side, your acceleration is ____

Back 9

first negative. then positive

Front 10

the equation used to find acceleration is =

Back 10

vf-vi/t

Front 11

a horizontal line in a velocity/time graph shows ____ acceleration

Back 11

zero

Front 12

inertia varies depending ____

Back 12

mass

Front 13

newtons first law of motion is also called the law of ___

Back 13

inertia

Front 14

the upward force in an object falling through the air is ____

Back 14

air resistance

Front 15

the relationship among mass, force, and acceleration is explained by ___

Back 15

newtons second law of motion

Front 16

a feather will fall through the air more slowly than a brick because of ____

Back 16

air resistance

Front 17

in the absence of air, a penny and a feather that are dropped from the same height at the same time will ____

Back 17

fall at the same rate

Front 18

the acceleration due to gravity is ___

Back 18

9.8 m/s2

Front 19

according to newtons second law of motion, ____

Back 19

f= m × a

Front 20

when an object moves in a circular path, it accelerates toward the center of the circle as a result of ____

Back 20

centripetal force

Front 21

the path of a projectile is ___

Back 21

curved

Front 22

for any object, the greater the force that's applied to it, the greater its ____ will be

Back 22

acceleration

Front 23

the size of the gravitational force between two objects depends on their ___

Back 23

masses and the distance between them

Front 24

as you get farther from the center of Earth, your weight will ___

Back 24

decrease

Front 25

when a force is exerted on a box, an equal and opposite force is exerted by the box. these forces are called ____ forces.

Back 25

action-reaction

Front 26

a real car moving at 10 km/h has more momentum than a toy car moving at the same speed because the real car ____

Back 26

has greater mass

Front 27

in the equation p = m × v, the p represents ____

Back 27

momentum

Front 28

the statement "to every action there is an equal and opposite reaction" is ___

Back 28

newtons third law of motion

Front 29

the unit of momentum is ___

Back 29

kg × m/s

Front 30

when two alls collide, the momentum of the balls after the collision us explained by ____

Back 30

the law of conservation of momentum

Front 31

a 300-N force acts on a 25-kg object. the acceleration of the object is ___

Back 31

12 m/s2

Front 32

a 3,000-N force acts on a 200kg object. the acceleration of the object is ____

Back 32

15 m/s2

Front 33

an object that is in free fall seems to be ___

Back 33

weightless

Front 34

if gravity did NOT affect the path of a horizontal thrown ball, the ball would ____

Back 34

travel horizontally

Front 35

a ball attached to a string is being swung in a clockwise circular path as shown in figure 3-1. assume the strung breaks at point A. in which direction will the ball be traveling an instant later?

Back 35

direction d

Front 36

in which direction will the acceleration on the back be when the ball passes point A?

Back 36

direction b

Front 37

the kinetic energy of an object increases as its ____ increases

Back 37

velocity

Front 38

increasing the speed of an object ___ its potential energy.

Back 38

does not affect

Front 39

the SI unit for energy is the ___.

Back 39

joule

Front 40

you can calculate kinetic energy by using the equation ____

Back 40

KE (J) = 1/2 M (KG) × V2 (M2/S2)

Front 41

you can calculate gravitational potential energy by using the equation

Back 41

GOE (J) = m (kg) × 9.8 m/s2 × h (m)

Front 42

which of the following devices does not make use of electrical energy?

Back 42

upright piano

Front 43

a bus engine transfers chemical potential energy into ____ so that the bus moves.

Back 43

kinetic energy

Front 44

in a nuclear fusion reaction, mass its transformed into ___

Back 44

energy

Front 45

according to the law of conservation of energy. the total amount of energy in the universe ____

Back 45

remains constant