Physics Questions & Answers

Physics Questions & Answers A bike resting at the top of a hill would be an example of what type of energy? - CORRECT ANSWER- Potential A car traveling 89 m/s east slams on its breaks. The car stops after 12 seconds of breaking. What is the average acceleration of the car? - CORRECT ANSWER- - 7.4 m/s^2 east A runner competes in the 400 meter dash and finishes with a time of 64 seconds. If the track is a perfect oval, with the starting line and finish line at the same point, and the runner's average speed was 6.25 meters/second, what was the total distance travelled by the runner? - CORRECT ANSWER- 400 meters A speed limit sign along a highway in Montana says 70 mph. This information on this sign is an example of - CORRECT ANSWER- A scalar quantity A vector is - CORRECT ANSWER- A quantity containing a magnitude and a direction Acceleration is - CORRECT ANSWER- The rate of change of an object's velocity Acceleration is: - CORRECT ANSWER- the rate of change of velocity. According to Newton's first law of motion, what would happen to a car traveling west at a constant velocity of 55 MPH in the absence of an unbalanced force? - CORRECT ANSWERThe car would continue moving west with a velocity of 55 MPH According to the Kinetic Molecular Theory, temperature is directly proportional to - CORRECT ANSWER- average kinetic energy All voltage sources: - CORRECT ANSWER- convert one type of energy into electrical energy to generate voltage An 80 lb cheetah jogging left at 15 m/s suddenly accelerates to 30 m/s. The cheetah crosses about 45 meters of savannah and needs 2 seconds to reach 30 m/s. What was the cheetah's acceleration? - CORRECT ANSWER- 7.5 m/s^2 left An atom becomes a negative ion when... - CORRECT ANSWER- an electron joins the atom An electric force field: - CORRECT ANSWER- is the space around a charged particle where other charged particles will experience a force An example of a good conductor is: - CORRECT ANSWER- copper An ideal gas - CORRECT ANSWER- An ideal gas is a theoretical gas that follows a set of principles.