Answer:
Explanation:
The marble released through the trap door inside the elevator going upward at a speed vo would have an upward velocity of vo, but begins to experience a downward acceleration g = 9.81m/s^2. This is essentially same as throwing the marble up at a speed of vo. We can solve for the greatest height using the law of energy conservation.
When the marble is traveling up, its potential energy is converted to kinetic energy:
where m is the marble mass and h is the vertical distance traveled from the releasing point to the maximum height.
We can divide both sides by m
This is only partial of the height from the ground. To find the total height we need to add the height from the ground to the release point, which is the distance traveled by the elevator within time t = 2.35s at speed vo
Plug in the value for vo and we can calculate the maximum height
Answer:
Positive y-axis
Explanation:
First of all, we need to find the direction of the magnetic force.
We know that the direction of the magnetic force on a charged moving particles is perpendicular to both the velocity of the particle and the direction of the magnetic field. For a positive charged particle, we can use the right-hand rule. In this case, we find:
- index finger: direction of the velocity of the particle (positive x-axis)
- middle finger: direction of the magnetic field (positive z-axis)
- thumb: direction of the magnetic force (in this case, negative y-axis)
Therefore, the direction of the magnetic force is in the negative y-axis.
In order for the particle to not change its velocity (so, being undeflected), the electric force must balance the magnetic force: therefore, the electric force must be in the opposite direction as the magnetic force, so in the
positive y-axis
direction.
We also know that for a positively charged particle ,the direction of the electric force is the same as the electric field: therefore, the direction of the electric field is also along the positive y-axis.
Average speed = (distance covered) / (time to cover the distance)
= (600 km / 10 hr) = 60 km/hr
a) the distance an object moves to the amount of time needed to travel the distance.
i hope this helps :3