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## Class 11 Physics (India)

### Unit 10: Lesson 3

Work-energy theorem

# Velocity and mass from force vs. position graphs

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## Problem

A horizontal net force F is exerted on an object at rest. The object starts at x, equals, 0, start text, m, end text and has a speed of 4, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction after moving 6, point, 0, start text, m, end text along a horizontal frictionless surface. The net force F as a function of the object's position x is shown below.
Net horizontal force (N) vs. horizontal position (m) graph. Y-intercept is zero and it has a slope of 5 m/s.
What is the mass of the object?
Round answer to 2 significant digits.
start text, k, g, end text
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