Answer:
c)
Explanation:
A collision is said to be elastic when the total kinetic energy is the same after the collision. The speed of objects that are stuck together will always be less than the initial speed of the object that was in motion given that the other particle was at rest. It is because the kinetic energy of the system was due to the moving object. The objects have a greater overall mass when they are stuck. If the kinetic energy is the same and the mass increases, the velocity must decrease.
No, it goes against your country. Your not even allowed to have the flag be on the ground, it is foul.
The answer would be:
Pulling a trailer up a hill
Here is why:
In physics, work is computed by the formula:
W = Fd or F(cosΘ)d
Where: F = Force applied on the object
d =displacement
So in order for work to be done, the object needs to be displaced. In the case of the trailer, the trailer is being pulled and it is travelling in the direction of the force applied.
The other options the object is not displaced. Even if you exert a force, if the displacement remains the same, then it will always be zero, so the force times displacement will be 0, hence no work is done.
Answer:
Raul will be 30 meters to the right of observer.
Explanation:
Raul is walking towards the observer, let be the position of Raul with respect to the observer and, besides, that is negative to the left and positive to the right.
Raul is moving at constant rate so that velocity () is equal to:
Where:
, - Initial and final position of Raul regarding the observer, measured in meters.
- Change in time, measured in seconds.
Given that , and , the velocity of Raul is:
The equation of his displacement is represented by clearing final position in the equation above:
If and , the equation of motion is:
Then, if , the final position of Raul regarding the observer is:
Raul will be 30 meters to the right of observer.