Respuesta :
Newton's second law and kinematics allows answering the questions about the fall of the stone are:
- The acceleration is constant and is a = g = 9.8 m / s²
- Speed increases linearly.
- The position increases quadratically.
Newton's second law relates the net force, mass, and acceleration of a body.
F = ma
Where F is the force, m the mass and the acceleration.
Kinematics studies the movement of bodies, looking for relationships between position, velocity and acceleration.
In this case, it is allowed to lose it from a bridge, the only force acting on it is its weight.
W = ma
m g = ma
a = g
The acceleration of the stone is constant throughout the movement.
Taking the acceleration of the stone we can find its speed and position.
v = v₀ - g t
y = y₀ + v₀ t - ½ g t²
where v₀ is the initial velocity of the stone which is zero and t time.
v = - gt
y = t₀ - ½ g t²
We can see that the speed of the stone increases linearly and the position increases quadratically with time.
In conclusion using Newton's second law and kinematics we can answer the questions about the fall of the stone are:
- The acceleration is constant and is a = g = 9.8 m / s²
- Speed increases linearly.
- The position increases quadratically.
Learn more about Newton's second law here: brainly.com/question/13403365
