Ephys ch 2

Question 1

is a progressive change of position of a body

Answer 1

motion

Question 2

change in motion is the result of an

Answer 2

applied force

Question 3

is typically described in terms of velocity, acceleration, displacement, and time

Answer 3

motion

Question 4

1st law of newton

Answer 4

law of inertia

Question 5

a body which does not move is said to be

Answer 5

at rest

Question 6

is the velocity of a body is the same at every moment during which the motion takes place

Answer 6

uniform motion

Question 7

refers to the motion decreasing

Answer 7

retarded motion

Question 8

is the branch of science that deals only with the motions of bodies without references to the forces that cause them

Answer 8

kinematics

Question 9

branch of mechanics concerned with the motions of objects without being concerned with the forces that cause the motion

Answer 9

kinematics

Question 10

is the time-rate of change of distance and is expressed as distance divided by time

Answer 10

velocity

Question 11

the time-rate of change of velocity and is expressed as velocity divided by time

Answer 11

acceleration

Question 12

is the position or body relative to another known point

Answer 12

displacement

Question 13

vector measure of the interval between two locations measured along the shortest path connecting them

Answer 13

displacement

Question 14

is a scalar measure of the interval between two locations

Answer 14

distance

Question 15

refers to moving body or particles in a straight line

Answer 15

rectilinear motion

Question 16

is the motion of rigid body about a fixed point

Answer 16

rotational motion

Question 17

describes how fast it is turning about an axis

Answer 17

angular velocity

Question 18

change in angular velocity divided by time elapsed

Answer 18

angular acceleration

Question 19

is the motion along a curved path

Answer 19

curvilinear motion

Question 20

is the ideal falling motion of a body acted upon by the pull of the earth’s gravitational field

Answer 20

free fall

Question 21

is an object which is falling under the sole influence of gravity

Answer 21

free falling object

Question 22

the velocity of a particle at a particular instant of time

Answer 22

instantaneous velocity

Question 23

absolute value of the instantaneous velocity

Answer 23

instantaneous speed