Finally, you know that the steeper the hill, the faster you go. The steepest "hill" you could imagine is not much like a hill at all, but rather a sheer vertical drop—where objects go into free fall and where gravity gives the biggest push of all. You wouldn't want to try that on your bicycle! In free fall, gravity constantly accelerates an object increases its velocity —until it hits terminal velocity.
Specifically, gravity increases a falling object's velocity by 9. How does this constant acceleration affect the distance that an object travels over time?
In this experiment you will roll a marble down a ramp to find out. Observations and results Did the marble travel faster as it went farther down the slope? When an object is in free fall, gravity increases its velocity by 9. So after one second the object would be falling at a velocity of 9. After two seconds the object would be falling at a velocity of After three seconds the object would be falling at a velocity of Although this activity was not performed in free fall the presence of the ramp provides resistance to slow the marble down , the same idea applies here.
Gravity should have constantly accelerated the marble as it rolled down the ramp in this activity. This can be seen by comparing the average distance between the starting line and the one-second marks to the distance between the one-second marks and the two-second marks.
Specifically, the distance between the one- and two-second marks should have been greater than the distance between the starting line and the one-second marks, showing that the marble moved faster the longer it rolled. Depending on the exact conditions of your ramp setup, the distance between the one- and two-second marks may have been about 1.
This activity brought to you in partnership with Science Buddies. Already a subscriber? Sign in. After carrying out my Preliminary run I realised that I could have made the test more accurate to get more reliable results. In my experiment I will take in to consideration the following;. Horizontal -inverse tangent.
Safety is very important in a scientific experiment even if the experiment may seem harmless. To make this experiment safe I will make sure equipment is always handled with a lot of care to avoid an accident.
Also I will not run around as one could get hurt. Also I will keep the desktop that I am working as clean as possible, so that there is nothing on the desktop, except for the apparatus needed thus; an accident does not happen. If an accident does occur I will inform the teacher straightaway.
Another way to record the time would be to use a light gate. This would be connected to a computer light and it would indicate when the ball passes the points at the top and bottom connected to the lights.
On the whole I think my experiment went really well. I believe that I carried out my experiment reasonably, and I encountered no problems. As a result I ended up with an applicable set of results. I could carry out another experiment that would be quite similar to this one. I could investigate how the mass of a ball affected the speed.
The two changing variables would be the weight of the ball and the steepness of the slope. Fair testing and safety would be just as important. I would have to use the same apparatus and overall the same method. Also all the improvements I mentioned above I could use for this experiment. I would predict that the ball with greater mass would roll down the slowest and the ball with the least mass would roll down the fastest.
This is because a greater force would be needed to accelerate the ball with more mass, whereas a smaller amount of force would be needed to accelerate the ball will less mass. Also my preliminary run backs up my prediction as I can see that it took the three balls at the same height different speeds to roll down. Get Full Access Now or Learn more. If the ramp is horizontal, then the ball does not accelerate, as gravity pushes the ball into the ramp and not along the surface of the ramp.
If the ramp is vertical, the ball just drops with acceleration due to gravity. These arguments are changed a bit by the fact that the ball is rolling and not sliding, but that only affects the magnitude of the acceleration but not the fact that it increases with ramp steepness. The change in potential energy of the ball is its mass times the change in height only the vertical component counts -- horizontal displacements do not change gravitational potential energy times the local gravitational acceleration g.
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