and N.A. Rodina. "Mir" publisher, Moscow, 1985.

It is the official textbook for 6 and 7 grades in Russia.

At the end of the textbook there is a section: rewiew questions (p.320-333). The problem I mentioned is from the section: Work and Power, p. 328 (in original problem velocities are in km/h).

So, Luis, how about solving that 7-grade problem?


A couple more problem from the same text:

1) A sportsman whose mass is 70 kg jumps to the height 200 cm in 0.4 s. What power does he develop during the jump? (p.328)

This one from the same 7-grade text makes many of my US university students stuck forever with no clue:

2) Electric kettle with the resistance 100 ohm is connected to 220 V outlet. How much water is heated by it from 20 C to the boiling point in 20 min? (p. 332)

Luis, can YOU pass russian 7-grade physics? (I am deeply afraid that with your PREHISTORIC knowledge in physics - not a chance).

• Stop picking on the old ladies - luis_hamburgh - November 18, 2001 - 00:20 UTC
  • Luis, I love that. - alexander - November 18, 2001 - 14:57 UTC
    • Oh NO! He called my bluff! :) - luis_hamburgh - November 18, 2001 - 19:34 UTC
      • One out of 3 problems for 7 grade solved correctly. - alexander - November 19, 2001 - 22:29 UTC
        • D'oh! - luis_hamburgh - November 19, 2001 - 23:42 UTC