Jeremy analyses one of his parachute jumps.
Answers
Answer:
Acceleration = 1m/s^2. Avg. Speed = 45m/s.
Step-by-step explanation:
See attachment.
For curved velocity - time graphs, you need to draw a tangent for the acceleration questions. Since it asked for acceleration at t = 10s, we need to draw a straight line that touches the graph at only one point, and that point is 10 seconds (from the question).
Now, you need to be as accurate as possible when drawing tangents, because they must touch the line at only one point.
Next, from the tangent, calculate the gradient. You can do this by drawing two more lines from the tangent to form a triangle, then divide the rise by then run or: ΔY/ΔX. And that triangle before the Y and before the X just means delta, which means change. So change in y over the change in X. So 10/10 = 1. So 1m/s^2.
The average speed is the distance divided by the time. How do we get the distance? Get the area under the graph. Since it's a curved graph, it's more difficult to get nice shapes to calculate the area of. This is why the question asks you to estimate, no-one will sit there and count each tiny little square for the area. So we split the area under the graph into some shapes that we can calculate the area of. The more shapes you split the area into, the more accurate your answer will be.
Good luck student!
Answer:
the first one is wrong
Step-by-step explanation:
i wrote it into mathswatch