A car starts at rest and accelerates at a rate of 4 m/s^2. How far does the car travel in 5 seconds? Why?

A) 10 m
B) 20 m
C) 50 m
D) 100m

C. 50m

Explanation:

Given parameters:

Initial velocity  = 0m/s

Acceleration  = 4m/s²

Time of travel  = 5s

Unknown:

distance covered  = ?

Solution:

To solve this problem, we use the expression below;

   S  = ut  + at²  

S is the distance

u is the initial speed

t is the time

a is the acceleration

            S  = (0x 5) + x 4 x 5²   = 50m

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

b.

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