is that true or false A rock is thrown straight up into the air At the peak its acceleration was zero
Is gravity still pulling it down? Acceleration is due to gravity.
From my point of view the rock at its maximum height the acceleration is zero as velocity of rock is zero . acceleration is change in velocity/time as velocity is zero accelation is zero because any thing divided by zero is zero
True.
When a rock is thrown straight up into the air, its acceleration at the peak (highest point) is zero. This is because at the peak, the rock momentarily stops moving upward before it starts to fall back down. During this brief moment, its velocity is changing from positive (upward) to zero, resulting in an acceleration of zero.
To understand this concept, we can use the basic principles of motion and analyze the acceleration of the rock at different points in its trajectory. The acceleration of an object is the rate at which its velocity changes over time.
When the rock is thrown straight up, it initially has a positive velocity (going up) and a positive acceleration (gravity accelerating it downward). However, as the rock moves upwards, the force of gravity acts against it, gradually slowing it down. Eventually, the rock reaches its highest point, where its velocity becomes zero. At this moment, the acceleration is also zero because there is no change in velocity.
Once the rock reaches its peak and starts falling back down, the acceleration becomes negative as gravity now accelerates the rock downwards.