Part A:
For this part we’re assuming all the kinetic energy of the moving bumper car is converted into elastic potential energy in the spring since the car is brought to rest. Therefore you can find the total kinetic energy to get your answer:
KE = ½ mv^2
KE = ½ (200)(8)^2
KE = 6400 J
Part B:
Now you can use Hooke’s law to find the force:
F = kx
F = (5000)(0.2)
F = 1000 N
Answer:
Explanation:
Given:
- volume of liquid content in the can,
- mass of filled can,
- weight of empty can,
<u>So, mass of the empty can:</u>
<u>Hence the mass of liquid(soda):</u>
<u>Therefore the density of liquid soda:</u>
(as density is given as mass per unit volume of the substance)
<u>Specific weight of the liquid soda:</u>
Specific gravity is the density of the substance to the density of water:
where:
density of water
Yes. On a circular path, the direction of motion is constantly changing. Change of direction is acceleration, even at constant speed.