1.Which of the following illustrates acceleration?
A.constant velocity
B.changing direction
C.direction does not change
D.constant speed
2.Which of the following statements CORRECTLY describes displacement?
A. Change in position over time
B. The direction where the object is moving
C. The length of the entire path that an object travelled.
D. The shortest distance between the object's two positions
3.The following are correctly matched, EXCEPT
A. acceleration - 0.5 m2/s2
B. speed - 5 m/s
C. distance - 10 m
D. velocity - 2 m/s
4. Sound can damage our ears. How can we protect our ears from getting damaged by a sounds?
A. turn down the volume of the TV , radio, or music.
B. Limit the length of time of exposure to loud sounds.
C. use hearing protection devices such as earplugs when you cannot avoid loud sounds.
D.All of the above.