When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and thus, slows him down. Suppose the weight of the sky diver is 913 N and the drag force has a magnitude of 1010 N. The mass of
the sky diver is 93.2 kg. Take upward to be the positive direction. What is his acceleration, including sign?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

Question 7 [2 marks] in the circuit below, the electromotive force generated by the battery is e = 6.0 v, and the resistances are r1 = r4 = 1.0 q, r2 = r3 =2.0 q. r. the power delivered by the battery to the circuit is closest to a. 6 w в. 12 w с. 15 w d. 18 w e. 20 w final exam autumn 2014 page 5 of 9 68037 physical modelling faculty of science [2 mark] question 8 with reference to question 7, the current through resistor r2 is closest to a. 1 a в. 2 а c. 3 a d. 4 a e. 6 a