How can I calculate the gravity if I use a toy car to run down a slope? Also if I change the distance of the starting point of the toy car on the same slope, what effect would it have?

Question

rane · Answer

it depends on then wht measurements u r given

anonymous · Answer

Say the slope is 45 degrees from the ground. Slope is 1 meter. Height is 0.5 meters. (I made these measurements up). Are you sure the measurements matter? Isn't there a formula to find the gravity?

anonymous · Answer

I was told to use the formula $$S=UT+\frac{ 1 }{ 2 }AT ^{2}$$
Where A is:
$$A = g \cos \theta $$
But the UT cancels out since the value of U = 0
So it would be:

$$S=\frac{ 1 }{ 2 }g \cos \theta T ^{2}$$

This is what I was told to use but i'm not sure how this helps me find the gravity.

anonymous · Answer

$$\frac{2 \Delta S}{\cos(\theta) \Delta t^{2}} = g$$

anonymous · Answer

What does the triangle mean? Sorry haven't been taught this haha. And if I change the distance of the starting point of the toy car would that effect anything?

anonymous · Answer

The triangle is a capital delta and it means a change in, so change in S or change in t

anonymous · Answer

Let's say the slope is 45 degrees. Height of the slope is 0.5m. The slope is 2m. I'll roll a ball down it and it takes 1.5 seconds to reach the bottom. To find the gravity would I use the formula Eleven17 mentioned and go.

$$\frac{ 2x2 }{ \cos 45x1.5^{2} } = g$$

rane · Answer

u can

anonymous · Answer

What is that formula called? Does it have a particular name?

rane · Answer

in phys formula's dont have names bt they r known by wht we have to find using that formula

anonymous · Answer

Alright thanks guys really helped a lot. But one more thing. Would a good independent variable for my experiment of finding gravity be changing the value of S? I just have to calculate the gravity in my suburb.