Applying the formula of force equals mass times acceleration, and considering acceleration approximated as g at 10 m/s², the brick possessing the greater mass will hit the ground first due to its superior force that counteracts resistive forces like air resistance.
Answer:
Please include the diagrams and repost them.
Part A: -,+
The elevator descends, dictating the velocity's direction, which aligns with the movement's path. With the positive direction defined as upward, the velocity is negative. After the emergency button is pressed, the elevator begins to stop, indicating that the velocity is decreasing. Therefore, the acceleration is oriented in the opposite way to the velocity, making its sign +.
Part B: +, -
The ball ascends, which determines the positive direction of the velocity. Hence, the velocity is positive.
Once the ball is thrown, the only force acting on it is gravity, opposing the ball’s ascent and causing it to descend. This means the acceleration is directed downwards, resulting in a negative sign.
Part C: 0, -
Throughout the ball's trajectory from the moment it's thrown until it drops to the ground, gravity constantly exerts downward acceleration (-).
After the throw, the ball's velocity will decline due to gravity. When it reaches a velocity of 0, it achieves its peak height. At this specific moment, the ball begins to descend again under the influence of gravity. However, at the peak height, the ball's velocity is 0.
Answer: Reduced acceleration leads to an increase in mass.
Explanation:
We can rephrase this as:
"When a constant force F is applied, heavier objects experience less acceleration"
As a result, when mass rises, the object's acceleration diminishes.
This is referred to as an inverse correlation between acceleration and mass.
According to Newton's second law, we find that:
F = m*a
Force equals mass multiplied by acceleration.
So, if the force remains constant, we can express it as:
a = F/m.
In this equation, we observe that if acceleration decreases and F stays constant, then the mass m must also rise (as it is found in the denominator)
Therefore, the accurate statement is:
A decrease in acceleration causes the mass to increase.
The result will be 21.6, but rounding yields 22J.
