L2 Mechanics

Question 1

v=ꕔd/ꕔt

Answer 1

v=Velocity
ꕔd=change in distance
ꕔt=change in time

Question 2

What are the units?

Velocity

V=ꕔd/ꕔt, a=ꕔv/ꕔt, vf=vi+at, d=vit+1/2at^2, d=(vi+vf)/2*t, vf^2=vi^2+2ad,

Answer 2

ms-1

Question 3

What are the units?

Distance

V=ꕔd/ꕔt, d=vit+1/2at^2, d=(vi+vf)/2*t, vf^2=vi^2+2ad

Answer 3

Meters (m)

Question 4

What are the units?

Time

V=ꕔd/ꕔt, d=vit+1/2at^2, a=ꕔv/ꕔt, d=(vi+vf)/2*t, vf=vi+at

Answer 4

Seconds (s)

Question 5

a=ꕔv/ꕔt

Answer 5

a=acceleration
ꕔv=change in velocity
ꕔt=change in time

Question 6

What are the units?

Accleration

a=ꕔv/ꕔt, vf=vi+at, d=vit+1/2at^2, vf^2=vi^2+2ad, ac=v^2/r, F=ma

Answer 6

ms-2

Question 7

vf=vi+at

Answer 7

vf=final velocity
vi=initial velocity
a=acceleration
t=time

Question 8

d=(vi+vf)/2*t

Answer 8

d=distance
vi=initial velocity
vf=final velocity
t-time

Question 9

vf^2=vi^2+2ad

Answer 9

vf=final velocity
vi=initial velocity
a=acceleration
d=distance

Question 10

d=vi*t+1/2at^2

Answer 10

d=distance
vi=initial velocity
t=time
a=acceleration

Question 11

F=-kx

Answer 11

F=force on spring
k=spring constant
x=extenson

Question 12

What are the units

Spring Constant

F=-kx, Ep=1/2kx^2

Answer 12

Nm-1

Question 13

What are the Units

Force

F=ma, t=Fd, F=-kx, Fc=mv^2/r, ꕔp=Fꕔt, W=fd

Answer 13

Newtons (N)

Question 14

What are the units?

Extension

F=-kx, Ep=1/2kx^2

Answer 14

Meters (m)

Question 15

ac=v^2/r

Answer 15

ac=Centripetal acceleration
v=Tangential velocity
r=Radius of circle

Question 16

What are the units?

Radius of Circle

Answer 16

Meters (m)

Question 17

Fc=mv^2/r

Answer 17

Fc=Force centrifugal
m=mass
v=velocity
r=radius

Question 18

What are the units?

Mass

F=ma, Fc=mv^2/r p=mv, Ek=1/2mv^2, ꕔEp=mgꕔh

Answer 18

Kilograms (kgs)

Question 19

t=Fd

Answer 19

T=Torque
F=Force
d=Perpendicular distance

Question 20

What are the units?

Torque

t=fd

Answer 20

Newtons per meters (Nm)

Question 21

Ep=mgh

Answer 21

Ep=gravataional potentioal energy
m=mass
g=gravity
h=change in height

Question 22

What are the units?

Gravatational potential

ꕔEp=mgꕔh

Answer 22

Joules (J)

Question 23

What are the Units?

Change in height

ꕔEp=mgꕔh

Answer 23

Meters (m)

Question 24

ꕔEk=1/2mv^2

Answer 24

Ek=Kinetic Energy
m=Mass
v=velocity

Question 25

# What are the units? Kinectic Energy | ꕔEk=1/2mv^2,

Answer 25

Joules (J)

Question 26

ꕔEp=1/2kx^2

Answer 26

**Ep**=Energy stored in the spring **k**=spring constant **x**=exenstion

Question 27

W=Fd

Answer 27

**W**=work **F**=force **D**=distance

Question 28

# What are the units? Work | W=Fd, P=W/t

Answer 28

Joules (J)

Question 29

P=w/t

Answer 29

**P**=Power **W**=work **t**=time

Question 30

# What are the units? Power

Answer 30

Watts (W)

Question 31

p=mv

Answer 31

**p**=Momentum **m**=Mass **v**=Velocity

Question 32

# What are the units? Momentum

Answer 32

kg ms-1

Question 33

ꕔp=pf-pi

Answer 33

**ꕔp**=change in momentum **pf**=final momentum **p**i=initial momentum

Question 34

ꕔp=fꕔt

Answer 34

**ꕔp**=change in momentum **f**=force **ꕔt**=change in time

Question 35

F=ma

Answer 35

**F**=Force **m**=mass **a**=acceleration