Chuck Norris’ leg angularly accelerates 3000°/s2 around the hip joint during a roundhouse kick in the transverse plane. The moment of inertia of the leg around the axis of rotation for this kick is 0.75 kg·m2. How large is the torque that produces Chuck Norris’ acceleration as he roundhouse kicks a dinosaur? Because the earth only started spinning after Chuck Norris gave it a roundhouse which caused the extinction of the dinosaurs.
Angular Momentum
The momentum of an object is given by multiplying its mass and velocity. Momentum is a property of any object that moves with mass. The only difference between angular momentum and linear momentum is that angular momentum deals with moving or spinning objects. A moving particle's linear momentum can be thought of as a measure of its linear motion. The force is proportional to the rate of change of linear momentum. Angular momentum is always directly proportional to mass. In rotational motion, the concept of angular momentum is often used. Since it is a conserved quantity—the total angular momentum of a closed system remains constant—it is a significant quantity in physics. To understand the concept of angular momentum first we need to understand a rigid body and its movement, a position vector that is used to specify the position of particles in space. A rigid body possesses motion it may be linear or rotational. Rotational motion plays important role in angular momentum.
Moment of a Force
The idea of moments is an important concept in physics. It arises from the fact that distance often plays an important part in the interaction of, or in determining the impact of forces on bodies. Moments are often described by their order [first, second, or higher order] based on the power to which the distance has to be raised to understand the phenomenon. Of particular note are the second-order moment of mass (Moment of Inertia) and moments of force.
roundhouse kick in the transverse plane. The moment of inertia of the leg around the axis
of rotation for this kick is 0.75 kg·m2. How large is the torque that produces Chuck
Norris’ acceleration as he roundhouse kicks a dinosaur? Because the earth only started
spinning after Chuck Norris gave it a roundhouse which caused the extinction of the
dinosaurs.
39.27 Nm
9. Bubba Watson is driving a golf ball off the tee. His downswing takes 0.50 s from the top
of the swing until ball impact. At the top of the swing, the club’s
at the instant of ball impact, the club’s angular velocity is 30 rad/s. The swing moment of
inertia of the club about the grip is 0.220 kg·m2. What average torque does Bubba exert
on the golf club during the downswing? Maybe he will take all of Tiger’s money on the
LIV tour....
13.2 Nm
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