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1 answer:
Volume of the original block (V) of length (l), width (w) and height (h) is given by the following equation
hence volume of original block, V = (6)(4)(10) =
Now say we cut this block in two equal parts, than the length of new block will be ; where as its width and height will be same as of original block i.e. 4 cm and 10 cm respectively.
So, Volume of half-block is ; or we can say that the volume of half-block is half that of orignal block.
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Answer:
Given:
mass of the ball m = 0.144 kg
velocity v = 38 m/s
now, change in momentum
P = m v- ( - mv)
= 2 mv
=2 x (0.144) x (38)
= 10.944 kg-m/s
Impulse J= F. Δt
change in momentum is equal to impulse
J = 10.944 kg-m/s
we know force is equal to change in momentum per unit time
F = 13.68 x 10³ N
F = 13.68 kN
Angle made by the light ray with the surface of mirror is given as
degree
now as we know as per law of reflection that
angle of incidence = angle of reflection
So here we can say that
now the total angle that reflected ray will rotate with respect to incident ray is known as angle of deviation
so here reflected light will deviate by total angle of 40 degree fron its incident ray.