47. See Multiple-Concept Ex- ample 12 to review some of the Pulley concepts that come into play here. The crane shown in the drawing is lifting a 180-kg crate upward with an acceleration of 1.2 m/s?. The cable from the Drum Вoom crate passes over a solid cylindri- cal pulley at the top of the boom. The pulley has a mass of 130 kg. The cable is then wound onto a hollow cylindrical drum that is mounted on the deck of the crane. The mass of the drum is 150 kg, and its radius is 0.76 m. The engine applies a counterclockwise torque to the drum in order to wind up the cable. What is the magnitude of this torque? Ignore the mass of the cable.

47. See Multiple-Concept Ex- ample 12 to review some of the Pulley concepts that come into play here. The crane shown in the drawing is lifting a 180-kg crate upward with an acceleration of 1.2 m/s?. The cable from the Drum Вoom crate passes over a solid cylindri- cal pulley at the top of the boom. The pulley has a mass of 130 kg. The cable is then wound onto a hollow cylindrical drum that is mounted on the deck of the crane. The mass of the drum is 150 kg, and its radius is 0.76 m. The engine applies a counterclockwise torque to the drum in order to wind up the cable. What is the magnitude of this torque? Ignore the mass of the cable.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter12: Static Equilibrium And Elasticity

Section: Chapter Questions

Problem 37P: To get up on the roof, a person (mass 70.0 kg) places 6.00-m aluminum ladder (mass 10.0 kg) against...

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Concept explainers

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.

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* 47. See Multiple-Concept Ex-
ample 12 to review some of the
concepts that come into play
Pulley
here. The crane shown in the
drawing is lifting a 180-kg crate
upward with an acceleration of
1.2 m/s?. The cable from the
Drum
Вoom
crate passes over a solid cylindri-
cal pulley at the top of the boom.
The pulley has a mass of 130 kg.
The cable is then wound onto a hollow cylindrical drum that is mounted
on the deck of the crane. The mass of the drum is 150 kg, and its radius
is 0.76 m. The engine applies a counterclockwise torque to the drum in
order to wind up the cable. What is the magnitude of this torque? Ignore
the mass of the cable.

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