Explanation:
1) the diagonal force times the sine of the angle it makes will give you the vertical component or y component . use this to get the vertical components of all the diagonal forces . add all the vertical components as well as the vertical forces together
2) the diagonal force times the cosine of the angle it makes gives the horizontal component or x component. do this to get the x component of all the diagonal forces.
add all the x components as well as the horizontal forces together to get the final x component
3)using the triangle of vectors, the resultant force is calculated
sum of y component = 3.2N
sum of x component= 5.7N
resultant force = 6.5N
Ur right 2.23848):$/)/8-&:
Answer:
13.26°
Explanation:
Using Snell's law as:
Where,
is the angle of incidence ( 35.0° )
is the angle of refraction ( ? )
is the refractive index of the refraction medium (glass, n=2.5)
is the refractive index of the incidence medium (air, n=1)
Hence,
Angle of refraction= sin⁻¹ 0.2294 = 13.26°.
<u>13.26° is the angle of the beam with the normal in the glass.</u>
The work done is the same as the amount of energy increase. The formula for kinetic energy is 122
1
2
m
v
2
.
The initial KE of the car is 12(1000)×202=200,000
1
2
(
1000
)
×
20
2
=
200
,
000
joules.
The final KE of the car is 12(1000)×302=450,000
1
2
(
1000
)
×
30
2
=
450
,
000
joules.
The difference between these is the amount of work done: 450,000−200,000=250,000
450
,
000
−
200
,
000
=
250
,
000
joules.
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