Question
A flea jumps by exerting a force of 1.20 × 10⁻⁵ N straight down on the ground. A breeze blowing on the flea parallel to the ground exerts a force of 0.500 × 10⁻⁶ N on the flea while the flea is still in contact with the ground. Find the direction and magnitude of the acceleration of the flea if its mass is 6.00 × 10⁻⁷ kg. Do not neglect the gravitational force.
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This is a calculation for the contact phase specified in OpenStax University Physics Volume 1, Chapter 6, Problem 28, using g = 9.80 m/s². The given downward force is the flea’s force on the ground; its equal-magnitude upward reaction acts on the flea. Choose positive horizontal along the breeze because no compass direction is supplied. These are idealized calculated results, not observed jump data, and they do not describe the later airborne phase.