The stone was thrown horizontally at a speed of 3 m / s. After 0.4 seconds, he fell to the ground.
| January 10, 2021 | education
The stone was thrown horizontally at a speed of 3 m / s. After 0.4 seconds, he fell to the ground. The speed of the stone at the moment of falling is …
The stone will move at a constant horizontal speed until it hits the ground (Vg = 3 m / s). The vertical speed of the stone is expressed by the formula: Vw = g * ∆t (g = 10 m / s², ∆t = 0.4 s).
Since the velocity vectors are directed at an angle of 90º to each other, the Pythagorean theorem can be applied:
V² = Vg² + Vb² = Vg² + (g * ∆t) ².
V = √ (Vg² + (g * ∆t) ²) = √ (3² + (10 * 0.4) ²) = √ (9 + 16) = √ (25) = 5 m / s.
Answer: The speed of the stone at the moment of falling is 5 m / s.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
