In Fig. 7-47, a cord runs around two massless, frictionless pulleys. A canister with mass m = 20 kg hangs from one pulley, and you exert a force F → on the free end of the cord.(a) What must be the magnitude of F → if you are to lift the canister at a constant speed? (b) To lift the canister by 2.0 cm, how far must you pull the free end of the cord? During that lift, what is the work done on the canister by (c) your force (via the cord) and (d) the gravitational force? ( Hint: When a cord loops around a pulley as shown, it pulls on the pulley with a net force that is twice the tension in the cord.) Figure 7-47 Problem 65.
In Fig. 7-47, a cord runs around two massless, frictionless pulleys. A canister with mass m = 20 kg hangs from one pulley, and you exert a force F → on the free end of the cord.(a) What must be the magnitude of F → if you are to lift the canister at a constant speed? (b) To lift the canister by 2.0 cm, how far must you pull the free end of the cord? During that lift, what is the work done on the canister by (c) your force (via the cord) and (d) the gravitational force? ( Hint: When a cord loops around a pulley as shown, it pulls on the pulley with a net force that is twice the tension in the cord.) Figure 7-47 Problem 65.
In Fig. 7-47, a cord runs around two massless, frictionless pulleys. A canister with mass m = 20 kg hangs from one pulley, and you exert a force
F
→
on the free end of the cord.(a) What must be the magnitude of
F
→
if you are to lift the canister at a constant speed? (b) To lift the canister by 2.0 cm, how far must you pull the free end of the cord? During that lift, what is the work done on the canister by (c) your force (via the cord) and (d) the gravitational force? (Hint:When a cord loops around a pulley as shown, it pulls on the pulley with a net force that is twice the tension in the cord.)
An extremely long, solid nonconducting cylinder has a radius Ro. The charge density within the cylinder is a
function of the distance R from the axis, given by PE (R) = po(R/Ro)², po > 0.
An extremely long, solid nonconducting cylinder has a radius Ro. The charge density within the cylinder is a
function of the distance R from the axis, given by PE (R) = po(R/Ro)², po > 0.
Chapter 7 Solutions
Fundamentals Of Physics 11th Edition Loose-leaf Print Companion Volume 2 With Wileyplus Card Set
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Work and Energy - Physics 101 / AP Physics 1 Review with Dianna Cowern; Author: Physics Girl;https://www.youtube.com/watch?v=rKwK06stPS8;License: Standard YouTube License, CC-BY