# Question: Assume that a 1 00 kg ball is thrown solely by the

Assume that a 1.00-kg ball is thrown solely by the action of the forearm, which rotates about the elbow joint under the action of the triceps muscle, Fig. 8-45. The ball is accelerated uniformly from rest to 10.0m/s in 0.350s, at which point it is released. Calculate

(a) The angular acceleration of the arm, and

(b) The force required of the triceps muscle. Assume that the forearm has a mass of 3.70 kg and rotates like a uniform rod about an axis at its end.

(a) The angular acceleration of the arm, and

(b) The force required of the triceps muscle. Assume that the forearm has a mass of 3.70 kg and rotates like a uniform rod about an axis at its end.

**View Solution:**## Answer to relevant Questions

A helicopter rotor blade can be considered a long thin rod, as shown in Fig. 8-46.(a) If each of the three rotor helicopter blades is 3.75m long and has a mass of 160kg. Calculate the moment of inertia of the three rotor ...A bowling ball of mass 7.3 kg and radius 9.0 cm rolls without slipping down a lane at 3.3m/s. Calculate its total kinetic energy.(a) What is the angular momentum of a 2.8-kg uniform cylindrical grinding wheel of radius 18cm when rotating at 1500 rpm?(b) How much torque is required to stop it in 6.0s?A uniform disk turns at 2.4 rev/s around a frictionless spindle. A non-rotating rod, of the same mass as the disk and length equal to the disk’s diameter is dropped onto the freely spinning disk, Fig. 8-49. They then both ...The Moon orbits the Earth such that the same side always faces the Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the latter case, treat the Moon as ...Post your question