If a stone is thrown vertically up in a moving lorry,where will the stone fall? Explain.
Ignoring air resistance, and assuming "vertically up" means with respect to the lorry, the stone will fall "vertically down" with respect to the lorry.
To determine where the stone will fall in this scenario, we need to consider two factors: the vertical motion of the stone and the horizontal motion of the lorry.
First, let's focus on the stone's vertical motion. When thrown vertically up, the stone follows a parabolic trajectory due to the force of gravity acting upon it. As the stone moves upward, it slows down until it reaches its maximum height, called the apex. At this point, its vertical velocity becomes zero. Then, it starts to fall back down, accelerating due to gravity.
Now, let's consider the horizontal motion of the lorry. As the lorry moves forward, the stone will also move forward in the same direction at the same speed as the lorry since they are both in the same moving reference frame. This means that the horizontal component of the stone's velocity matches that of the lorry.
Based on these factors, the stone will eventually fall back down due to gravity, following a parabolic trajectory. However, since the stone and the lorry have the same horizontal velocity, the stone will fall at the same horizontal location where it was thrown. In other words, the stone will fall back down into the lorry, assuming the lorry does not change its speed or direction during the stone's flight.