Answered: a. A vernier caliper was used for…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter15: Fluids

Section: Chapter Questions

Problem 46PQ

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Question

a. A vernier caliper was used for taking the diameter of a sphere of unknown material. The radius measured is 2.56 cm and the mass of the spherical object is 150 grams. What is the density of this object in g/cc?

b. A ball of mass m1 and a block of mass m2 are attached by a lightweight cord that passes over a frictionless pulley of negligible mass, as shown in the figure. The block lies on a frictionless incline of angle theta. If theta becomes zero, what will happen?

CHOICES:

- The acceleration will be reversed in direction.

- The velocity of m2 will keep on going.

- m1 will start to move upward.

- Nothing will change to the acceleration of the system.

c. s = 0.5*a*t^2 is a kinematic equation used to solve acceleration. What can we say about the initial velocity of the body when we use this equation?

d. Using kinematics and dynamics equation used in the experiment, derive an expression to solve the time it takes for the heavier mass to reach the ground.

e. If the string was cut the moment the heavier mass was released, what will be the acceleration of the falling mass assuming no air resistance?

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