Science Bowl Practice Questions – Physics

Science Bowl Practice Questions Physics - 420. Short Answer: A helicopter is ascending vertically with a constant speed of 6 meters per secondrelative to the ground. At the instant the helicopter is 60 meters above the ground it releases a package.What is the magnitude and direction of the velocity of the package, relative to the ground, the instantthe package is released by the helicopter?ANSWER: 6 METERS/SECOND UP21. Multiple Choice: If the distance between two objects, each of mass 'M', is tripled, the force of attractionbetween the two objects is:w) 1/2 the original forcex) 1/3 the original forcey) 1/9 the original forcez) unchangedANSWER: Y -- 1/9 THE ORIGINAL FORCE22. Short Answer: A 40 kilogram girl climbs a vertical distance of 5 meters in twenty seconds at a constantvelocity. How much work has the girl done?ANSWER: 2000 JOULES or 1960 JOULES23. Short Answer: A machine performs 8 Joules of work in 2 seconds. How much power is delivered bythis machine?ANSWER: 4 WATTS24. Multiple Choice: In physics, a radian per second is a unit of:w) angular displacementx) angular velocityy) angular accelerationz) angular momentum.ANSWER: X -- ANGULAR VELOCITY25. Multiple Choice: If the resultant force acting on a body of constant mass is zero, the body's momentumis:w) increasingx) decreasingy) always zeroz) constantANSWER: Z – CONSTANT26. Short Answer: What is the name of the first American physicist to win two Nobel prizes?ANSWER: (JOHN) BARDEEN27. Multiple Choice: Which of the following scientists is responsible for the exclusion principle whichstates that two objects may NOT occupy the same space at the same time? Was it:w) Heisenbergx) Bohry) Tellerz) PauliANSWER: Z -- PAULI