Taking right movement to be positive means leftward movement is negative.
Hence we have a deceleration of
Using this 'suvat' equation
we can determine the initial velocity
Hence the initial velocity is 13.0 meters per seconds
Answer:
Ray A = Incidence ray
Ray B = Reflected ray
Explanation:
From the law of reflection,
Normal: This is the line that makes an angle of 90° with the reflecting surface.
Ray A is the incidence ray: This is the ray that srikes the surface of a reflecting surface. The angle formed between the normal and the incidence ray is called the incidence angle
Ray B is the reflected ray: This is the ray leaves the surface of a reflecting surface. The angle formed between the reflected ray and the normal is called reflected angle
Answer: One is called the dependent variable and the other the independent variable. The independent variable is the variable the experimenter changes or controls and is assumed to have a direct effect on the dependent variable.
Answer:
option B
Explanation:
given,
two plane are moving in same altitude at a distance of 1.0 km apart.
angle of depression of the two planes given are 45° and 37°
now, the diagram is attached below
using diagram,
now in ΔAOC
tan 45° = 
x = h..................(1)
now using triangle ΔBOD
tan 37° = 
from equation (1)
0.754 = 
0.754 h + 753.56 = h
0.246 h = 753.56
h = 3063.5 m
hence, the correct answer is option B
