Posted by **Mikaela** on Monday, December 14, 2009 at 9:32pm.

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 if you are to lift 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 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 on the canister?

## Answer This Question

## Related Questions

- physics - A massless string runs around two massless, frictionless pulleys. An ...
- Physics - A massless string runs around two massless, frictionless pulleys, ...
- physics - A block (mass = 2.9 kg) is hanging from a massless cord that is ...
- Physic - A block (mass 2.4 kg) is hanging from a massless cord that is wrapped ...
- physics - A block of mass 4.44 kg lies on a frictionless horizontal surface. The...
- physics - A system has three masses, a 10kg mass is lying on a level surface and...
- AP physics - A uniform spherical shell of mass M and radius R rotates about a ...
- AP Physics - A uniform spherical shell of mass M and radius R rotates about a ...
- Physics - A block of mass 5.53 kg lies on a frictionless horizontal surface. The...
- physics - A block of mass 3.62 kg lies on a frictionless horizontal surface. The...

More Related Questions