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(1I) The pilot of an airplane traveling 170 $\mathrm{km} / \mathrm{h}$ wants to drop supplics to flood victims isolated on a patch of land 150 $\mathrm{m}$ below. The supplies should be dropped how manyseconds before the plane is directly overhead?

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5.5 $\mathrm{s}$

Physics 101 Mechanics

Chapter 3

Kinematics in Two or Three Dimensions; Vectors

Motion Along a Straight Line

Motion in 2d or 3d

Newton's Laws of Motion

Rotation of Rigid Bodies

Dynamics of Rotational Motion

Equilibrium and Elasticity

University of Michigan - Ann Arbor

Simon Fraser University

Hope College

University of Winnipeg

Lectures

02:34

In physics, a rigid body is an object that is not deformed by the stress of external forces. The term "rigid body" is used in the context of classical mechanics, where it refers to a body that has no degrees of freedom and is completely described by its position and the forces applied to it. A rigid body is a special case of a solid body, and is one type of spatial body. The term "rigid body" is also used in the context of continuum mechanics, where it refers to a solid body that is deformed by external forces, but does not change in volume. In continuum mechanics, a rigid body is a continuous body that has no internal degrees of freedom. The term "rigid body" is also used in the context of quantum mechanics, where it refers to a body that cannot be squeezed into a smaller volume without changing its shape.

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In physics, rotational dynamics is the study of the kinematics and kinetics of rotational motion, the motion of rigid bodies, and the about axes of the body. It can be divided into the study of torque and the study of angular velocity.

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So here we're gonna choose downwards to be positive. So downwards is positive on. Then we can say the origin is where the point where the supplies were dropped s so we can say. And then the final position would be all the way down. So 150 meters. And so we can say that here, uh, you can say Delta y equals V. Why initial t plus 1/2 g t squared. This is zero because although the other, the shipment has a positive X velocity, it has no initial velocity in the UAE direction. Therefore, T would be equal to the square root of two times delta y divided by G, and this would equal the square root of two times 150 meters, divided by 9.80 meters per second squared. We find that tea's gonna equal approximately 5.5 seconds. This would be our final answer. That is the end of the solution. Thank you for watching

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