Answer Happy

Question 21 There is a 5 kg box sliding on a friction-less surface. How much work was done when the object moved 10 meters on the surface? (Hint: Remember, Work Force applied x distance covered) 1000 Joules 500 Joules -500 Joules 0 Joules Question 22 25 N For a spring with spring constant 2 N/m, how much force would be exerted when it is stretched by 25 meters? 100 N 4 pts 50 N 12.5 N 4 pts
Question 23 In the Uniform Circular Motion experiment, the slope of a V2 vs. r graph is expected to be: (Hint: Look at the formula) m/Fc r/m F/m m/r Question 24 remain the same In the Uniform Circular Motion lab, the period for a complete cycle was measured for a mass spun at a constant speed about a fixed radius and with a constant centripetal force, Fe. If the radius was increased in increments, while the force and mass remained constant, the period of a complete cycle is expected to decrease increase 4 pts none of the above. 4 pts
Question 25 In the Uniform Circular Motion lab, we manipulated the equation v² = Fer /m. If we kept the mass and force constant and varied r, what would be the expected slope of a line for v² vs. F? r/m m'r m/r Question 26 A spring, with spring constant of 156 N/m, and a suspended 0.900 kg mass, are undergoing simple harmonic motion. What would the expected period be? 0.239 s 0.076 s 4 pts 0.477 s 4 pts