A block with mass m = 12 kg is pushed up a frictionless ramp that makes an angle 0 = 25° above the horizontal. The pushing force F = 65 N points horizontally (as opposed to straight up the ramp), and the block moves a distance d = 4.7 m up the ramp during this motion. If there are any forces acting on the block besides F, then add them to the diagram below. Based on your diagram alone (no calculations necessary), which force(s) did positive work on the block? Negative work? Zero work? Calculate the work done on the block by each force that appears in your diagram. What was the box's change in kinetic energy during this motion? Did the box speed up or slow down during this motion? Explain your reasoning. Suppose that the block started off at rest. What was its final speed?

A block with mass m = 12 kg is pushed up a frictionless ramp that makes an angle 0 = 25° above the horizontal. The pushing force F = 65 N points horizontally (as opposed to straight up the ramp), and the block moves a distance d = 4.7 m up the ramp during this motion. If there are any forces acting on the block besides F, then add them to the diagram below. Based on your diagram alone (no calculations necessary), which force(s) did positive work on the block? Negative work? Zero work? Calculate the work done on the block by each force that appears in your diagram. What was the box's change in kinetic energy during this motion? Did the box speed up or slow down during this motion? Explain your reasoning. Suppose that the block started off at rest. What was its final speed?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

Question

A block with mass m = 12 kg is pushed up a frictionless ramp that makes an angle 0 = 25°
above the horizontal. The pushing force F = 65 N points horizontally (as opposed to straight
up the ramp), and the block moves a distance d = 4.7 m up the ramp during this motion.
If there are any forces acting on the block besides F, then add them to the diagram below.
Based on your diagram alone (no calculations necessary), which force(s) did positive work
on the block? Negative work? Zero work?
Calculate the work done on the block by each force that appears in your diagram.
What was the box's change in kinetic energy during this motion?
Did the box speed up or slow down during this motion? Explain your reasoning.
Suppose that the block started off at rest. What was its final speed?

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