#8 8. A horizontal force of 200 N is applied to a 55-kg cart across a 10-m horizontal skurface.(a) If the cart accelerates at 2 m/s, the work done by the 200 N force is(b) The work done by the force of friction as it acts to slow down the motion of the cart is9. A rock is thrown straight vertically upward with an initial velocity of 15 m/s. Ignoreenergy lost to air friction. (a) The rock will rise to a maximum height of _The velocity of the rock at half that maximum height is(b)10. A Hooke's law spring is compressed 12 cm from equilibrium and the potential energystored is 3.6 J. (a) The spring constant in this case isused to launch a mass of 20 gram along a frictionless surface. The "launch speed" of the(b) The spring is thenmass is11 of 11

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8. A horizontal force of 200 N is applied to a 55-kg cart across a 10-m horizontal skurface. (a) If the cart accelerates at 2 m/s, the work done by the 200 N force is (b) The work done by the force of friction as it acts to slow down the motion of the cart is

8. A horizontal force of 200 N is applied to a 55-kg cart across a 10-m horizontal skurface. (a) If the cart accelerates at 2 m/s, the work done by the 200 N force is (b) The work done by the force of friction as it acts to slow down the motion of the cart is

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 4P: a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the...

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Question

8. A horizontal force of 200 N is applied to a 55-kg cart across a 10-m horizontal skurface.
(a) If the cart accelerates at 2 m/s, the work done by the 200 N force is
(b) The work done by the force of friction as it acts to slow down the motion of the cart is
9. A rock is thrown straight vertically upward with an initial velocity of 15 m/s. Ignore
energy lost to air friction. (a) The rock will rise to a maximum height of _
The velocity of the rock at half that maximum height is
(b)
10. A Hooke's law spring is compressed 12 cm from equilibrium and the potential energy
stored is 3.6 J. (a) The spring constant in this case is
used to launch a mass of 20 gram along a frictionless surface. The "launch speed" of the
(b) The spring is then
mass is
11 of 11

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