explain why must the ramp be angled initially to get a starting height
If its' not angled, it is not a ramp
If the ramp is not angled then the car will not move
The purpose of angling a ramp initially is to provide an initial height for an object to start moving from rest. When an object is placed on a ramp, gravity pulls it downwards. The angle of the ramp affects how much of the gravitational force acts in the direction of motion and how much acts perpendicular to the ramp's surface.
By tilting the ramp, we can increase the component of the gravitational force that acts in the direction of motion. As a result, the object will start moving in that direction, as long as the component of force in that direction is greater than the opposing forces, such as friction. This initial movement is essential for determining the object's starting height, as it allows us to measure its position or trajectory from the initial point of motion.
To calculate the starting height of the object, you would need to consider the angle of the ramp, the gravitational force acting on the object, and any other forces involved, like friction or air resistance. By analyzing these factors, you can determine the height from which the object started and how it will behave as it moves down the inclined ramp.