A roller coaster car accelerates uniformly covers a distance of 50 m while increasing its speed from 5.0 m/s to 25 m/s. How long does it take for this to occur? What is its average velocity over
this distance? (3.3 s. 15 m/s)
Proof please

Explanation:

Given parameters:

Distance covered  = 50m

Initial velocity  = 5m/s

Final velocity  = 25m/s

Unknown:

Time taken to cover the distance  = ?

Average velocity   = ?

Solution:

To solve this problem, we use the expression below:

   x  =  

x is the distance

v is the final velocity

u is the initial velocity

t is the time

   50 =  x t

   50  = 15 x t

   t  = 3.3s

Average velocity  =   =   = 15m/s

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.

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is