MOTION KINEMATICS DYNAMICS

Question 1

what is the variable for acceleration and definition?

Answer 1

variable for acceleration is (a) and tells how much the object’s speed changes in one second.

Question 2

There are 3 kinematic equations in which to solve for motion. What is the 3rd equation?

Answer 2

v_f² = v_o² + 2a^x delta x

Question 3

What SI unit and common variables are associated with velocity?

Answer 3

Velocity or speed has SI units of meters/second (m/s).

The variable v is used for velocity (a vector), though rarely used, s may be used for speed (magnitude only, scalar).

Question 4

What is the variable for speed?

Answer 4

variable for speed is (v)

Question 5

Answer 5

Question 6

In a velocity time graph, the slope is

Answer 6

the slope is the object’s acceleration

Question 7

In a position time graph, the object’s position is on what axis?

Answer 7

The vertical or y axis

Question 8

Answer 8

Question 9

Answer 9

Question 11

what are the 3 types of acceleration?

Answer 11

speeding up, slowing down, and turning

Question 12

what is the variable and definition of displacement?

Answer 12

the variable ^x (delta x) and tells how far the object ends up away from its starting point, regardless of any motion bewteen starting and ending position.

For example, a car leaves Lake Elsinore and drives 50 miles to Los Angeles. Then the car drives back another 50 miles back to Lake Elsinore. Total distance is 100 miles…..BUT total displacement is ZERO

Question 13

There are 3 kinematic equations in which to solve for motion. What is the 1st equation?

Answer 13

v_f = v_o + at

Question 14

Answer 14

Question 15

What SI unit and common variables are associated with area?

Answer 15

Area has SI units of meters2 (m2).

The variable A is used for area, S is used for surface area.

Question 16

There are 3 kinematic equations in which to solve for motion. What is the 2nd equation?

Answer 16

delta^x = v_ot + 1/2 at²

Question 17

What SI unit and common variables are associated with volume?

Answer 17

Volume has SI units of meters³ (m³).

The variable V is used for volume.

Question 18

define: direction of a vector

Answer 18

Question 19

In a velocity time graph, the object’s displacement is given by

Answer 19

displacement is given by the area between the graph and the horizontal axis

Question 20

What SI unit and common variables are associated with time?

Answer 20

Time has SI units of seconds (s).

The variable t is used for time, T is used for period and also has SI units of seconds.

Question 21

What is the kinematic chart and how many variables do you need to solve

Answer 21

you need at least 3 variables of the 5 to solve any motion problem

chart

v_o = initial velocity

v_f = final velocity

x = displacement

a = acceleration

t = time

Question 22

What two characteristics are necessary to define a vector?

Answer 22

Question 23

Answer 23

Question 24

Answer 24

Question 25

Define:

magnitude of a vector

Answer 25

Magnitude is the quantity, size, or amount and is a scalar value since it lacks direction.

Question 26

What is the variable used for position?

Answer 26

variable (x)

Question 27

In a velocity time graph, the object’s speed is read from what axis?

Answer 27

The object’s speed is read from the vertical or y axis

Question 28

What SI unit and common variables are associated with acceleration?

Answer 28

Acceleration has SI units of meters/second² (m/s²).

The variable a is used for acceleration (a vector).

Question 29

What SI unit and common variables are associated with acceleration?

Answer 29

Acceleration has SI units of meters/second² (m/s²).

The variable a is used for acceleration (a vector).

Question 30

What are the 3 goals of motion analysis?

Answer 30

to describe, calculate, and predict where an object is, how fast it’s moving, and how much its speed is changing.

Question 31

Answer 31

5 m/s.

Magnitude is the quantity, size, or amount.

Question 32

What are the 2 popular graphs used in motion?

Answer 32

Position Time Graphs and Velocity Time Graphs

Question 33

What is the definition of “freefall”?

Answer 33

means no forces other than the object’s weight are acting on the object.

Question 34

Give the instantaneous velocity for a 3kg block with a momentum of 12kg*m/s.

Answer 34

4m/s

From p = mv, 12 = 3(v), v = 4m/s.

Question 35

When an object is in freefall, then acceleration is…

Answer 35

10 m/s per second which is also called gravity. Note that the “real” value is 9.8 m/s/s but in AP physics, 10 is accepted.

Question 36

What SI unit and common variables are associated with velocity?

Answer 36

Velocity or speed has SI units of meters/second (m/s).

The variable v is used for velocity (a vector), though rarely used, s may be used for speed (magnitude only, scalar).

Question 37

define: component vectors

Answer 37

Question 38

What SI unit and common variables are associated with length?

Answer 38

Length or distance has SI units of meters (m).

The variables d and x are used for distance, h for height, z for depth, and r for radius.

Question 39

Answer 39

Directly upwards.

Direction is the angle, orientation, or path.

Question 40

In a position time graph, what is the slope?

Answer 40

The slope is the object’s speed.

Question 41

define: instantaneous velocity (v_o).

Answer 41