Answer: The right answer is c.
Explanation:
The kinetic energy is defined as follows:
K = 1/2 mv²
If both cars are identical, this means that they have the same mass.
Also, we are told that the speed is also the same for both cars.
If they are going in opposite directions, their velocities have the same magnitude, but opposite signs.
But even though they have different signs, the square (which is the parameter relevant for kinetic energy calculations), is always positive, as any number, elevated to an even power, is positive.
So, we conclude that both cars have the same kinetic energy, in magnitude and in sign.
Potential energy<span> of an object </span>depends on its mass and its distance from the center of mass of another object, the elastic potential energy<span> of an extended spring, and the electric </span>potential energy<span> of a electric charge in an electric field.</span>
The situation when nuclear fission occurs, some mass is lost is also called the mass defect and as a result the matter turns into energy. If you want to know where the mass does go Albert Einstein will be your helping hand : E = mc^2. Using this formulae you will solve the task and find out the direction of mass.
Answer:
250N
Explanation:
Given parameters:
Impulse = 500Ns
Time of action = 2s
Unknown:
The force that produced the impulse = ?
Solution:
The impulse on a body can be derived using the expression below;
Impulse = Force x time
Now, to find the force;
500 = Force x 2
Force = 250N
Answer:
It’s the last one, makes energy for the cell
