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

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.