1. **Problem Statement:**
A projectile is thrown towards a basket located 75 m away horizontally and 7.4 m high vertically. We need to determine mathematically if the object will successfully land in the basket.
2. **Given Data:**
- Horizontal distance, $x = 75$ m
- Height of basket, $y = 7.4$ m
- Initial velocity from graph approximately $v_0 = 15$ m/s at $t=0$
- Time at minimum velocity point $t = 2.65$ s
3. **Assumptions and Formulas:**
- Assume projectile motion under gravity $g = 9.8$ m/s$^2$
- Horizontal velocity $v_x$ is constant (no air resistance)
- Vertical velocity changes due to gravity
- Horizontal distance formula: $$x = v_x t$$
- Vertical position formula: $$y = v_{y0} t - \frac{1}{2} g t^2$$
4. **Find horizontal velocity $v_x$:**
From the graph, initial velocity is about 15 m/s, and velocity decreases to 0 at $t=2.65$ s, indicating vertical velocity component.
Assuming initial velocity is vertical component $v_{y0} = 15$ m/s.
5. **Calculate time to reach basket horizontally:**
Assuming horizontal velocity $v_x$ is constant and unknown, time to reach basket horizontally is $$t = \frac{x}{v_x}$$
6. **Calculate vertical position at time $t$:**
Vertical position at time $t$ is $$y = v_{y0} t - \frac{1}{2} g t^2$$
7. **Check if vertical position equals basket height:**
We want to find $t$ such that horizontal distance is 75 m:
$$t = \frac{75}{v_x}$$
Substitute into vertical position:
$$y = 15 t - 4.9 t^2$$
Set $y = 7.4$ m:
$$7.4 = 15 t - 4.9 t^2$$
Rearranged:
$$4.9 t^2 - 15 t + 7.4 = 0$$
8. **Solve quadratic equation:**
Using quadratic formula:
$$t = \frac{15 \pm \sqrt{15^2 - 4 \times 4.9 \times 7.4}}{2 \times 4.9}$$
Calculate discriminant:
$$15^2 - 4 \times 4.9 \times 7.4 = 225 - 144.96 = 80.04$$
Calculate roots:
$$t = \frac{15 \pm 8.95}{9.8}$$
Two solutions:
- $$t_1 = \frac{15 - 8.95}{9.8} = 0.62 \text{ s}$$
- $$t_2 = \frac{15 + 8.95}{9.8} = 2.44 \text{ s}$$
9. **Find horizontal velocity $v_x$ for each time:**
$$v_x = \frac{75}{t}$$
- For $t_1 = 0.62$ s, $$v_x = \frac{75}{0.62} = 121.0 \text{ m/s}$$ (unrealistic)
- For $t_2 = 2.44$ s, $$v_x = \frac{75}{2.44} = 30.7 \text{ m/s}$$
10. **Compare with initial velocity:**
Initial velocity magnitude from graph is about 15 m/s, but horizontal velocity needed is 30.7 m/s, which is higher.
**Conclusion:**
The object cannot reach the basket at 75 m distance and 7.4 m height with the given initial velocity of 15 m/s. Hence, the attempt to throw the object into the basket will not be successful mathematically.
Projectile Basket 1Ca9B6
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