6. An ice skater is able to make a triple-spins in the air before landing on the ice field safely is because of the following physical law: (a) Conservation of mechanical energy (b) Conservation of kinetic energy (c) Conservation of linear momentum (d) None of the above
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A: Solution:-Given that
An ice skater is able to make a triple-spins in the air before landing on the ice field safely is because of the following physical law
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- 6555&tags=autosave#questio... An air puck of mass 0.21 kg is tied to a string and allowed to revolve in a circle of radius 0.8 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of 1.2 kg is tied to it. The suspended mass remains in equilibrium while the puck on the tabletop revolves. for? (a) What is the tension in the string? N (b) What is the force causing the centripetal acceleration on the puck? for? (c) What is the speed of the puck?The vertical and horizontal poles at the traffic-light assembly are erected first. Determine the additional force and moment reactions at the base O caused by the addition of the three 117-lb traffic signals B, C, and D. Report your answers as a force magnitude and a moment magnitude. 22 A 29' 22" B. 117 lb 117 Ib 117 Ib Answers: O = Ilb Mo = i Ib-ftTwo identical bullets are fired horizontally with the identical velocities. One bullet is fired from a “rifled” barrel which makes the bullet spin alongthe axis of travel. The other bullet is fired from a smooth-bore barrel which imparts no spin. What is the downward drop due to gravity for these two bullets? a) The spinning bullet will drop more. b) The spinning bullet will drop less. c) Both bullets drop the same amount. d) It depends on the direction of the spin. e) It depends on the magnitude of the spin.
- View Policies Current Attempt in Progress On a banked race track, the smallest circular path on which cars can move has a radius of 121 m, while the largest has a radius of 168 m, as the drawing illustrates. The height of the outer wall is 15.1 m. Find (a) the smallest and (b) the largest speed at which cars can move on this track without relying on friction. (a) Number i Units (b) Number Units eTextbook and Media Save for Later Attempts: 0 of 2 used Submit Answer huluBraving the Rotor at the Amusement Park (Circular Motion Due to Normal Force) The Rotor is an amusement park ride where people stand against the inside of a spinning cylinder, as shown below. Once the cylinder is spinning at a certain speed, the floor drops out of the bottom of the cylinder but the people do not fall out of the bottom. A conservative low estimate of the coefficient of static friction between people's clothes and the cylinder wall is 0.45. The radius of the cylinder is 2.4 m. What is the minimum number of rpm that the cylinder can have so that the people do not fall out the bottom? (answer: 29 rpm)3. The Earth has a mass of 5.97 X 10²4 kg, and the Moon has a mass of 7.36 × 102 kg. The Moon orbits the Earth at a distance of 384,000 km; that is, the center of the Moon is a distance of 384,000 km from the center of the Earth, as shown below. How far from the center of the Earth is the center of mass of the Earth-Moon system? Earth -5.97-104 kg 384,000 km -7.36 102 kg Moon
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