Post a New Question

physics

posted by .

In which of these cases is a youngster doing work in the school gymnasium?

1. climbing up a rope
2. hanging motionless from a chinning bar.
3. lifting a set of weights from the floor to overhead


WHICH ONE & WHY? A BRIEF EXPLANATION WOULD BE NICE. thank you all =]

I will be happy to critique your thinking. Hint: Number two involves no work.

In which of these cases is a youngster doing work in the school gymnasium?

climbing up a rope

lifting a set of weights from the floor to overhead


WHICH ONE & WHY? CANT FiND THE ANSWER ANYWHERE.. NEED HElP FOR A TEST.. PlEASE EXPlAiN? TEST iS TOMORROW!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics - so important

    In which of these cases is a youngster doing work in the school gymnasium?
  2. PHYSICS

    There's a bar with length of 6.49m and mass of 5.45kg leaning against a frictionless wall. It makes an angle of 66.08 deg with the ground. A block with mass of 44.98 kg hangs from bar at distance d up from point of contact between …
  3. Physics

    A beam of mass mb = 10.0 kg, is suspended from the ceiling by a single rope. It has a mass of m2 = 40.0 kg attached at one end and an unknown mass m1 attached at the other. The beam has a length of L = 3 m, it is in static equilibrium, …
  4. Physics

    One-fourth of length L is hanging down over the edge of a frictionless, table. The rope has an uniform, linear density (mass per unit length), lambda, and the end already on the table is held by a person. a) How much work does the …
  5. Biomechanics

    An 88.9 kg weight lifter is required to perform a snatch movement for their final lift in a weight lifting competition. The standard weight lifting bar is 20 kg and the load attached to the bar was in the form of 6 x 20 kg weight discs, …
  6. college physics

    A 90 kg rock climber is stationary off the side of an overhanging cliff hanging onto her climbing rope. Another rope is tied to her foot and is attached at the other end to her 30 kg rock-climbing dog, also hanging out 2 m below her. …
  7. Physics

    A 10.0N frictionless pulley is suspended from an overhead supported by a chain. two weights suspend off the pulley. One weight is 30.0N and the other is 20.0N. (a) What is the tension on the rope?
  8. Physics

    A 10.0N frictionless pulley is suspended from an overhead supported by a chain. two weights suspend off the pulley. One weight is 30.0N and the other is 20.0N. (a) What is the tension on the rope?
  9. physics

    The figure below shows Superhero hanging motionless from a rope, with Trusty Sidekick hanging below him. Superhero's mass is 89.0 kg, while Trusty Sidekick's is 58.0kg, and the mass of the rope is negligible. (a) Find the tension in …
  10. physics

    a 10.0m long bar is attached by a frictionless hing to a wall and held horizontally by a rope that makes an angle of 53 deg with the bar the bar is uniform and weights 39.9 N. how far from the hinge should a 10.0kg mass be suspended …

More Similar Questions

Post a New Question