The net force is gravity. The speed is zero.
Any object moving under the influence of gravity only and no other outside forces has a constant acceleration of 9.8 meters (32.2 feet) per second2, directed down.The speed changes. The acceleration doesn't, regardless of the angle, speed, trajectory, color, temperature, cost, size, mass, or weight of the falling object.
At the halfway point of its path, the net force acting on the rock is equal to its weight. This is because at the peak of its trajectory, the only force acting on it is gravity pulling it downward. Therefore, at the halfway point, the net force is equal to the weight of the rock, which is equal to its mass multiplied by the acceleration due to gravity (9.8 m/s^2).
The "buoyant" force is acting on it, in the vertically upward direction. That force is equal to the weight of the water that would be in the volume of the rock if the rock weren't there.
At the exact top of its path, the rock's velocity will momentarily be zero before it starts falling back down due to gravity. This point is also known as the highest point of the rock's trajectory.
The rock will have a greater speed when it reaches the ground level compared to the ball thrown horizontally because the rock will be accelerated by gravity as it falls vertically, while the ball thrown horizontally will only have its initial horizontal velocity.
9.8 m/s (2) Squared
Any object moving under the influence of gravity only and no other outside forces has a constant acceleration of 9.8 meters (32.2 feet) per second2, directed down.The speed changes. The acceleration doesn't, regardless of the angle, speed, trajectory, color, temperature, cost, size, mass, or weight of the falling object.
At the halfway point of its path, the net force acting on the rock is equal to its weight. This is because at the peak of its trajectory, the only force acting on it is gravity pulling it downward. Therefore, at the halfway point, the net force is equal to the weight of the rock, which is equal to its mass multiplied by the acceleration due to gravity (9.8 m/s^2).
The "buoyant" force is acting on it, in the vertically upward direction. That force is equal to the weight of the water that would be in the volume of the rock if the rock weren't there.
At the exact top of its path, the rock's velocity will momentarily be zero before it starts falling back down due to gravity. This point is also known as the highest point of the rock's trajectory.
The rock will have a greater speed when it reaches the ground level compared to the ball thrown horizontally because the rock will be accelerated by gravity as it falls vertically, while the ball thrown horizontally will only have its initial horizontal velocity.
When the ground thaws, the force of gravity causes the soil and rock particles to fall back down. But they fall vertically, toward the center of Earth. The result is movement downhill.
Soil and rock particles typically fall vertically downward due to the force of gravity. The direction of their fall is determined by the pull of gravity towards the center of the Earth.
As the rock rises, the vertical component of its velocity decreases due to gravity pulling it downward. At the highest point of its trajectory, the vertical component of its velocity becomes zero before it starts to fall back down.
Justin Bieber has had a rock thrown at him by a fan trying to get his attention! But luckily it just missed him.
Gravity and air resistance.
dike