Which reacted faster, foot or hand?

[lostsummer]

Hi ! I have many questions and I did try to answers them, but I want to know if I am incorrect.
1) Which reacted faster, foot or hand ? try to use Newton explanation
I think the hand will react faster because it is closer to the brain... to send signal, but I am not sure how to explain that with Newton laws ( 1st and 2nd )

2) Why was the distance betweeen the top of the foot and the ball only measured to the nearest centimeter, while the place that caught the ruler was measure to nearest millimeter?
My guess is that with the ruler I could see the measurement and when the ball drop on the foot, the measurement is off by some millimeter.

3) Explain why the rocket and the ruler are both projectiles, despite their different paths.
this question I HAVE No idea.

 

[kuruman]

Hi lostsummer, welcome to PF. It would help us help you if you posted the statement of the problem with the underlying physical situation, instead of just the questions related to it. We are not mind readers, you know.

 

[tomcue]

1) According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by an external force. In this case, the external force would be the brain sending a signal to the hand or foot to react. Since the hand is closer to the brain, the signal would reach it faster and therefore it would react faster. Additionally, according to Newton's second law of motion, the force applied to an object is directly proportional to its mass and acceleration. The hand has less mass compared to the foot, so it would require less force to accelerate and react quickly.

2) The distance between the top of the foot and the ball was measured in centimeters because it is a larger unit of measurement compared to millimeters. This makes it easier to see and record the measurement accurately. The place that caught the ruler was measured in millimeters because it requires more precision. The millimeter is a smaller unit of measurement and can give a more accurate measurement of the distance traveled by the ruler.

3) Both the rocket and the ruler are projectiles because they are both objects that are launched into the air and follow a curved path due to the force of gravity. The difference in their paths is due to the different amount of force applied and the mass of the objects. The rocket has a greater force and mass compared to the ruler, causing it to travel higher and further before falling back down. However, both objects are still affected by the same force of gravity and follow a similar trajectory.