Kinematics

Question 1

What do scalar quantities have?

Answer 1

Magnitude, unit

Question 2

What do vector quantities have?

Answer 2

Magnitude, unit, direction

Question 3

Position

Answer 3

The location of an object relative to a reference point.

Question 4

Displacement

Answer 4

The change in position measured on the shortest path in a straight line.

Question 5

Velocity

Answer 5

Displacement of an object per unit of time.

Question 6

Uniform motion

Answer 6

Object moves in 1 direction in straight line with equal distance in equal time (no acceleration).

Question 7

Average velocity

Answer 7

Displacement divided by time.

Question 8

Instantaneous velocity

Answer 8

Velocity of object at specific instant of time

Question 9

Distance

Answer 9

Total path length

Question 10

Speed

Answer 10

Magnitude of velocity

Question 11

Average speed

Answer 11

Distance divided by time

Question 12

Acceleration

Answer 12

Rate of change of velocity

Question 13

How do you get velocity from a d-t graph?

Answer 13

Slope

Question 14

How do you get displacement on a v-t graph?

Answer 14

Area

Question 15

What is a sad face on a d-t graph?

Answer 15

Deceleration

Question 16

What is a happy face on a d-t graph?

Answer 16

Acceleration

Question 17

What is a linear slope on a d-t graph?

Answer 17

Constant velocity

Question 18

What is a flat line on a d-t graph?

Answer 18

Stopped

Question 19

What is a line on an angle on a v-t graph?

Answer 19

Acceleration

Question 20

What is a straight line on a v-t graph?

Answer 20

Constant velocity

Question 21

When does acceleration due to gravity occur?

Answer 21

When an object is allowed to free fall.

Question 22

When does free fall occur?

Answer 22

When there is no air resistance or any other force affecting the object other than gravity.

Question 23

What is the value of acceleration due to gravity?

Answer 23

9.8 m/s²

Question 24

How do you add vectors?

Answer 24

Tip to tail

Question 25

How do you reduce vectors into their orthogonal components?

Answer 25

Make it into a right triangle to find x and y components. Use SOH CAH TOA.

Question 26

How do you figure out projectile motion?

Answer 26

1) Time to fall (y component only)
2) Distance forward (x component only)
3) Impact velocity (x and y component)

Question 27

How do you figure out time to fall? (projectile motion)

Answer 27

a=9.8 m/s²
viy=0 m/s (not moving up or down before fall)
d=*given hight*
t=?
Use equation

Question 28

How do you figure out distance forward? (projectile motion)

Answer 28

vx=given speed at beginning
t=time to fall
Use equation (d=vt)

Question 29

How do you figure out impact velocity? (projectile motion)

Answer 29

vx=given speed at beginning
a=9.8 m/s²
d=given distance
viy=0 m/s (not moving up or down at start of fall)
vfy=?
Use equation
Make right triangle with vx and vfy to find hypotenuse