(III) A hammer thrower accelerates the hammer (mass =7.30 kg)from rest within four full turns (revolutions) andreleases it at a speed of 26.5 m/s Assuming a uniform rateof increase in angular velocity and a horizontal circularpath of radius 1.20 m, calculate (a) the angular acceleration,(b) the (linear) tangential acceleration, (c) the centripetalacceleration just before release, (d) the net force beingexerted on the hammer by the athlete just before release,and (e) the angle of this force with respect to the radius ofthe circular motion. Ignore gravity.
Rigid Body
A rigid body is an object which does not change its shape or undergo any significant deformation due to an external force or movement. Mathematically speaking, the distance between any two points inside the body doesn't change in any situation.
Rigid Body Dynamics
Rigid bodies are defined as inelastic shapes with negligible deformation, giving them an unchanging center of mass. It is also generally assumed that the mass of a rigid body is uniformly distributed. This property of rigid bodies comes in handy when we deal with concepts like momentum, angular momentum, force and torque. The study of these properties – viz., force, torque, momentum, and angular momentum – of a rigid body, is collectively known as rigid body dynamics (RBD).
(III) A hammer thrower accelerates the hammer (mass =7.30 kg)
from rest within four full turns (revolutions) and
releases it at a speed of 26.5 m/s Assuming a uniform rate
of increase in
path of radius 1.20 m, calculate (a) the
(b) the (linear) tangential acceleration, (c) the centripetal
acceleration just before release, (d) the net force being
exerted on the hammer by the athlete just before release,
and (e) the angle of this force with respect to the radius of
the circular motion. Ignore gravity.
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