What is the angle of reflection?
2 answers:
Explanation :
The process in which the object after striking on a reflecting surface bounces back is called reflection. This process is shown by the light and the sound waves etc.
There are two laws of reflection :
- The angle of incidence is equal to the angle of reflection.
- The normal, incident ray and the reflected ray and the point of incidence all lie in the same plane.
From the attached figure, it is clear that the angle of reflection is the angle between the reflected ray and the normal to the reflecting surface. It is denoted by .
Hence, the correct option is (C) " the angle that the reflected ray makes with a line drawn perpendicular to the reflecting surface ".
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Answer:
The mass of the ball is 1.360 kilograms.
Explanation:
By Work-Energy Theorem, gravitational potential energy (), in joules, is the product of weight of the ball (
), in newtons, and height (
), in meters. Please notice that weight is the product of the mass of the ball (
) and gravitational acceleration (
), in meters per square second. Then, the formula for the mass of the ball is:
(1)
If we know that ,
and
, then the mass of the ball is:
The mass of the ball is 1.360 kilograms.
Answer:
Around 3.57m/s
Explanation:
p=mv
Let's denote the momentum, mass, and velocity of the car with the subscript 1, and for the truck use 2. After the collision, the combined momentum can be denoted with the subscript 3.
Hope this helps!