Question

finding the slope of a launch ramp
when designing the jumps of a bmx racetrack, the jumps involve a launch ramp and a landing ramp. what facts about the placement of these features? check all that apply.
there must be at least ten launch ramps in every course.
the slope of a launch ramp cannot be too high or too low.
the length of a landing ramp must be long enough for riders to recover from the jump, but short enough not to lose speed for the next jump.
there can only be one landing ramp in every course.
the slope of a ramp is found by dividing the height of the ramp by the length of the ramp.

Explanation:

1. There is no requirement that there must be at least ten launch - ramps in every course, so this is incorrect.
2. The slope of a launch - ramp cannot be too high or too low as it affects the rider's take - off and safety, so this is correct.
3. The length of a landing ramp must be long enough for riders to recover from the jump but short enough not to lose speed for the next jump, which is a practical consideration in ramp design, so this is correct.
4. There can be multiple landing ramps in a course, not just one, so this is incorrect.
5. The slope of a ramp is indeed found by dividing the height of the ramp by the length of the ramp (rise over run), so this is correct.

Answer:

The slope of a launch ramp cannot be too high or too low.
The length of a landing ramp must be long enough for riders to recover from the jump, but short enough not to lose speed for the next jump.
The slope of a ramp is found by dividing the height of the ramp by the length of the ramp.