Lecture 7 PowerPoint

Lecture 7 PowerPoint - Today Apparent weight Forces in...

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1 Today Apparent weight. Forces in moving reference frames. Friction & Air Drag Thursday, 27 September, 12

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2 Question A person exerts a constant horizontal force on a large box and the box moves across the floor with constant velocity. The force applied by the person A. has the same magnitude as the weight of the box. B. is greater than the weight of the box. C. has the same magnitude as the total force that resists the motion of the box. D. is greater than the total force that resists the motion of the box. E. is greater than either the weight of the box or the total force that resists its motion. Thursday, 27 September, 12
3 Question A person exerts a constant horizontal force on a large box and the box moves across the floor with constant velocity. The force applied by the person A. has the same magnitude as the weight of the box. B. is greater than the weight of the box. C. has the same magnitude as the total force that resists the motion of the box. D. is greater than the total force that resists the motion of the box. E. is greater than either the weight of the box or the total force that resists its motion. Thursday, 27 September, 12

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4 Apparent Weight Weight = force of gravity on an object. Thursday, 27 September, 12
4 Apparent Weight Weight = force of gravity on an object. Feeling of being heavy due to contact forces supporting your weight (such as normal force ). Thursday, 27 September, 12

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4 Apparent Weight Weight = force of gravity on an object. Feeling of being heavy due to contact forces supporting your weight (such as normal force ). Floor pushing on your feet. Leg muscles supporting upper body, neck muscles supporting head, etc. Thursday, 27 September, 12
4 Apparent Weight Weight = force of gravity on an object.

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• Spring '11
• ERIC
• Force, Thursday

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