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Physics: Principles with Applications | 7th Edition | ISBN: 9780321625922 | Authors: Douglas C. Giancoli
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A person pushes a 14.0-kg lawn mower at constant speed

Chapter 4, Problem 50

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QUESTION:

A person pushes a 14.0-kg lawn mower at constant speed with a force of directed along the handle, which is at an angle of 45.0 to the horizontal (Fig. 458). (a) Draw the free-body diagram showing all forces acting on the mower. Calculate (b) the horizontal friction force on the mower, then (c) the normal force exerted vertically upward on the mower by the ground. (d) What force must the person exert on the lawn mower to accelerate it from rest to in 2.5 seconds, assuming the same friction force?

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QUESTION:

A person pushes a 14.0-kg lawn mower at constant speed with a force of directed along the handle, which is at an angle of 45.0 to the horizontal (Fig. 458). (a) Draw the free-body diagram showing all forces acting on the mower. Calculate (b) the horizontal friction force on the mower, then (c) the normal force exerted vertically upward on the mower by the ground. (d) What force must the person exert on the lawn mower to accelerate it from rest to in 2.5 seconds, assuming the same friction force?

ANSWER:

Problem-50

A person pushes a 14.0-kg lawn mower at constant speed with a force of F = 88.0 N directed along the handle, which is at an angle of 45.0 to the horizontal (Fig. 4-58). (a) Draw the free-body diagram showing all forces acting on the mower. Calculate (b) the horizontal friction force on the mower, then (c) the normal force exerted vertically upward on the mower by the ground. (d) What force must the person exert on the lawn mower to accelerate it from rest to in 2.5 seconds, assuming the same friction force?

                                                         Step by Step Solution

Step 1 of 5

Given data:

The force acting on the mower is

Th mass of the mower is

The force F acts on the mower at an angle of  

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