A block of m = 0.72 kg is pressed against a horizontal spring. To do so, you need a force of 55 N to compress the spring by 15 cm. Then the block is released and moves to the right on a horizontal and frictionless plane. a) What is the velocity with which the block leaves the spring? b) After that, the block enters an area where there is some friction between block and surface. The block comes to rest 1.6 m after it entered the surface with friction. What is the frictional coefficient between block and surface?

A block of m = 0.72 kg is pressed against a horizontal spring. To do so, you need a force of 55 N to compress the spring by 15 cm. Then the block is released and moves to the right on a horizontal and frictionless plane. a) What is the velocity with which the block leaves the spring? b) After that, the block enters an area where there is some friction between block and surface. The block comes to rest 1.6 m after it entered the surface with friction. What is the frictional coefficient between block and surface?

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Conservation Of Energy

Section: Chapter Questions

Problem 8.21P: A toy cannon uses a spring to project a 5.30-g soft rubber ball. The spring is originally compressed...

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Concept explainers

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.

Question

Problem 3.2

A block of m = 0.72 kg is pressed against a horizontal spring. To do so, you need a force of 55 N to
compress the spring by 15 cm. Then the block is released and moves to the right on a horizontal
and frictionless plane.
a) What is the velocity with which the block leaves the spring?
b) After that, the block enters an area where there is some friction between block and surface. The
block comes to rest 1.6 m after it entered the surface with friction. What is the frictional
coefficient between block and surface?

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