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Jonathan and Jane are sitting in a sleigh that is at rest on frictionless ice. Jonathan's weight is 800 $\mathrm{N}$ , Jane's weight is 600 $\mathrm{N}$ , and that of the sleigh and immediately see a poisonous spider on the floor of the sleigh and immediately jump off. Jonathan jumps to the left with a velocity of 5.00 $\mathrm{m} / \mathrm{s}$ at $30.0^{\circ}$ above the horizontal (relative to the ice), and Jane jumps to the right at 7.00 $\mathrm{m} / \mathrm{s}$ at $36.9^{\circ}$ above the horizontal (relative to the ice). Calculate the sleigh's horizontal velocity (magnitude and direction) after they jump out.

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$v_{C}=0.105 \mathrm{m} / \mathrm{s}$ to the right.

Physics 101 Mechanics

Chapter 8

Momentum, Impulse, and Collisions

Moment, Impulse, and Collisions

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Lectures

04:30

In classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. In the case of a constant force, the resulting change in momentum is equal to the force itself, and the impulse is the change in momentum divided by the time during which the force acts. Impulse applied to an object produces an equivalent force to that of the object's mass multiplied by its velocity. In an inertial reference frame, an object that has no net force on it will continue at a constant velocity forever. In classical mechanics, the change in an object's motion, due to a force applied, is called its acceleration. The SI unit of measure for impulse is the newton second.

03:30

In physics, impulse is the integral of a force, F, over the time interval, t, for which it acts. Given a force, F, applied for a time, t, the resulting change in momentum, p, is equal to the impulse, I. Impulse applied to a mass, m, is also equal to the change in the object's kinetic energy, T, as a result of the force acting on it.

10:59

Jonathan and Jane are sitt…

04:57

34:30

Two skiers, Annie and Jack…

10:24

10:57

Jack and Jill are standing…

07:41

Two ice skaters, Daniel (m…

04:46

A 60 -kg skater, at rest o…

10:41

02:16

Three ice skaters meet at …

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