Weekly Test in Physics (August 8, 2013)

I.                    Identification. Identify the following

1.       The rate at which an object moves.

2.       A vector quantity equal to the displacement divided by the elapsed time.

3.       The rate at which an object moves in a given direction.

4.       A scalar quantity equal to the total distance traveled in a given unit time.

5.       The rate of motion of an object when it is in uniform motion

6.       The speed measured at a particular time or instant.

7.       A device used to measure the speed at a particular time.

8.       A motion where in the speed is not changing.

II.                  Problem Solving.

1.       A car travels up a hill at a constant speed of 37 km/h and returns down the hill at a constant speed of 66 km/h. Calculate the average speed for the whole trip.

2.       Emily takes a trip, driving with a constant velocity of 90 km/h to the north except for 30 min rest stop. If Emily’s average velocity is 75 km/h to the north, how long does the trip take?