Question

How does baseball interact with newtons laws.

Answer 1

Newtons 2nd Law- The Net Force (ΣF) that is applied to an object is equal to its mass (m) multiplied by its acceleration (a).
F=m*a

Just like in Newton's first law above, the hips again are causing the force. The acceleration is generated from the hips motion. To obtain the largest amount of force, the player would need to be able to accelerate his hips along with having a heavy mass(the bat) to strike the ball.

Instead of linear motion that generates the force, a baseball swing is calculated using rotational motion.

"Rotational motion is similar to circular motion, except the object involved is a rigid body in which all points rotate around the center of mass of the object and not around a fixed point". (2)

Newtons second law still applies, but the force equation is transferred into rotation force, called torque. The mass is replaced with a quantity called inertia and the acceleration is now called angular acceleration.

T(torque)= I(inertia)*α(angular acceleration)

I=ß(constant)*m(mass)R(radius)^2

α=a(linear acceleration)/R(radius)

The torque then is dependent on the radius. the smaller the radius is, the larger the angular acceleration. When a player lowers the radius of his bat, he will have a smaller moment of inertia and a larger acceleration, maximizing his torque.

Answer 2

Newtons 1st law- An Object in motion tends to stay in motion unless acted upon by an outside force. As a baseball player stands ready to swing his bat a series of events must happen. Before he swings the bat his hips begin to rotate which sets off a chain reaction that moves his legs and upper body along with the bat to come through and hit the baseball. This action referred to as hips before hands. The Players hips act on both his legs and bat that would have otherwise remained at rest, following Newton's 1st law!!

Newtons 2nd Law- The net Force (∑F) That is applied to an object is equal to its mass (m) multiplied by its acceleration (a). F=m*a Just like in Newtons first law above the hips again are causing the force. The acceleration is generated from the hips motion. To obtain the largest amount of force the player would need to be able to accelerate his hips along with having a heavy mass (the bat) strike the ball. Instead of linear motion that generates the force, a baseball swing is calculated using rotational motion. Rotational motion is similar to circular motion except the object involved is a rigid body in which all point rotate around the center of mass of the object and not around a fixed point'. (2) Newtons second law still applies, but the force equation is transferred into rotation force, called torque. the mass is replaced with a quantity called inertia and the acceleration is now called the angular acceleration. T(torque)=I(inertia)*a(angular acceleration) I=β(constant)*m(mass)R(radius)² α=a *m l(linear acceleration)/R(radius) The torque then is dependent on the radius. The smaller the radius the larger the angular acceleration. When a player lowers the radius of his bat he will have a smaller moment of inertia and a larger acceleration, maximizing his torque.

Newtons 3rd law- Every force has its pair that is equal in magnitude but opposite in direction. This law explains why Major League Baseball players try their best to hit the baseball on the same plane out from the bat, as it came in from the pitcher. This will maximize the force output on the baseball.

Hope this helps! ;D