Answered: 1. The mass of a delivery truck is 4,…

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section: Chapter Questions

Problem 70A

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1. The mass of a delivery truck is 4, 116Kg . The center of mass is 0.50 m from the back tires and 2.50 m from the front tires. What is the Force (in N) acting on the front tires? 2. A sphere of mass 1.43 experiences an angular acceleration of 5.2rad / (s ^ 2) due to an application of a 28.6 N.m torque . Find the radius of the cylinder ? ( Moment of inertia of a disk is 2/5 mR^ 2 ) 3. A uniform disk has a mass of 0.911 K g and a radius of 1.371 m. Starting from rest , it accelerates to an angular velocity of 21rad / s in 0.56 s. Determine the net torque acting on the disk (Hint the moment of inertia of a disk is 1/2 mR^ 2 )

The mass of a delivery truck is 4,116 Kg. The center of mass
tires and 2.50 m from the front tires. What is the Force (in N
tires?
2.50m
0.50m
our Answer:

A cylinder, a sphere and a hoop of the same masses and radii are rolling from an
inclined plane. Which object arrives first at the bottom of the incline? (I_cylinder =
1/2 mR^2 and I_hoop = mR^2, 1_sphere = 2/5 mR^2)
Question options:
3D
%3D
O cylinder
O hoop
O All arrive at the same time
O sphere
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Question 7 (2 points)
A heavy boy and a lightweight girl are balanced on a massless seesaw. If they be
move forward so that they are one-half their original distance from the pivot pc
what will happen to the seesaw? Assume that both people are small enough
compared to tha lonath of the coÁcaw to ho thought of ac neint

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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