If a light Ray is reflected off the shiny surface at 170 degrees at what angle did the light-ray first strike the surface
2 answers:
Answer:
The light-ray first strike the surface at angle of 5 degrees.
Explanation:
It is given that,
If a light Ray is reflected off the shiny surface at 170 degrees. We have to determine the light- ray first strike the surface. It is based on the laws of reflection which states that the angle of incidence is equal to the angle of reflection.
Here, the angle between the reflected ray and the surface is 170 degrees. So, it is clear that the angle between the incident ray and the surface is 5 degrees.
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Answer:
The object has 1250 Joules of Kinetic Energy.
Explanation:
Kinetic Energy = mass*velocity²
KE = mv²
KE = (100kg)(5m/s)²
KE = (100kg)(25m/s²)
KE = 1250
KE = 1250J
Answer:
(c) time required to travel = 8 sec
Explanation:
We have given the final position = -10 m on x axis
And the initial position =10 m
So total distance = 10-(-10)=20 m
The speed is given as 2.5 m/sec
We have tof ind the time required by the person to travel
Time is given by
So the option (c) is correct option