Answer:
B) The car at point C has less kinetic energy than the car at point B.
Explanation:
We have two types of energy involved in this situation:
- Gravitational potential energy: this is the energy related to the heigth of the car, and it is given by 
, where m is the mass of the car, g is the gravitational acceleration, and h is the heigth of the car. The potential energy is higher when the car is located higher above the ground.
- Kinetic energy: this is the energy due to the motion of the car, and it is given by 
, where m is the mass of the car and v is its speed. The kinetic energy is higher when the speed of the car is higher.
- The law of conservation of energy states that the total mechanical energy of the car (sum of potential energy and kinetic energy: 
) is constant). This implies that when the car is at a higher point, the kinetic energy is less (because U is larger, so K must be smaller), while when the car is at a lower point, the kinetic energy is larger.
- Based on what we have written so far, we can conclude that the correct statement is:
B) The car at point C has less kinetic energy than the car at point B.
Because the car at point C is located at a higher point than point B, so the car at point C has larger potential energy than at point B, which implies that car at point C has less kinetic energy than the car at point B.
the more pressure put on the string, the more frequency and higher pitch.
Answer:
Color, Streak, luster, cleavage and fracture, hardness, crystal shape, and density.
Explanation:
Answer:
You want to fall in love with someone or get a boyfriend. Its a natural urge for everyone to feel so but comes the question how and why.
Explanation:
- I guess your age is below 20. This is the time you make career choices and important life decisions and choosing an emotional partner whom you give your total emotional control is one of them.
- You want to be strong enough, self-sufficient and complete before you take the step. Because many teenagers do not filter their partner and go deep for total physical features. Assuming you are complete and can afford relationship then you can take the step.
- Choose the person who sees the quality in you rather than physical features then you can definitely get a potential boyfriend. Be curious and know about him, befriend him and then take gradual steps .
