please answer true and false!!! thank you \"ialse.\" 1. Answer the following que
ID: 1788091 • Letter: P
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please answer true and false!!! thank you
"ialse." 1. Answer the following questions "true" or A body is in static equilibriurn if the body is motionless and the net force and net torque are zero. b) Angular momentum is conserved if there is no net force acting on the system. c) For a laminar body, the rotational inertia around an axis through the COM and normal to the lamina is equal to the sum of the rotational inertias around axes perpendicular to each other, perpendicular to the COM axis, and passing through the COM d) The "Rule of Three Forces" states that if an extended body is acted on by at least three forces, they must act through a common point. e) Since torque is a force at right angles to the moment arm, a torque cannot do any work. f) If a body is at rest, any frictional force present always acts to oppose the incipient g) If no net force acts on a system, the velocity of the center of mass of the system is h) i) j) motion a constant. Momentum and kinetic energy are conserved in a collision. The center of percussion of a baseball bat is the spot on the bat where you hit the ball in order to feel maximum impulse on your hands. Linear momentum is conserved if there is no net torque acting on the system.Explanation / Answer
a. True as it is satisfying all the conditions of static equilibrium.
b.False . Angular momentum is conserved if there is no net torque acting on the system.
c.True. This is noting but perpendicular axis theorem.
d. False. The body will be in equilibrium if all three forces act at only one point.
e. True. As work is scalar product of two vectors i.e. force and displacement. And product of two vectors perpendicular to each other is zero. So work done is zero. So work done by torque is zero.
f.True. this is the basic characteristics of friction.
g.True. Because no net force means zero acceleration. Zero acceleration means constant velocity.
h. False. momentum is conserved in collision. However, kinetic energy is conserved only in elastic collission.
i. True. This is the definition for the term " cent. of percussion"
j. False. Momentum is conserved if there is no net force acting on the system.
all the best in the course work.
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