Answer:
a) W = 40.49 10² J and b) W₂ = - 3308.7 J
Explanation:
The equation for work is
W = F. d
Bold indicates vectors, we can also write that equation with the modules
W = F d cos θ
Where θ is the angle between force and displacement
a) Traction reinforcement work
W = 3.59 10² 12.3 cos 23.5
W = 40.49 10² J
b) frictional force work, we have to use Newton's second law to find the friction force
Y Axis
N-W = 0
N = W
The formula for friction force is
fr = μ N
fr = μ mg
fr = 0.289 95.0 9.8
fr = 269 N
The friction force opposes the movement, so that at an angle it is 180º
W₂ = fr d cos T
W₂ = 269 12.3 cos 180
W₂ = - 3308.7 J
1000 miles = 1 609 340 m
2 weeks = 1209 600 s
v = 1609340/1209600 = 1.33 m/s
Answer:
the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced. Diffraction refers to various phenomena that occur when a wave encounters an obstacle or opening. It is defined as the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture.
Explanation: FYI I gave you the def and what it refers to BTW
I'm going to say A, tell me if I'm wrong