2016 In Bekoji S. S.School 2 Semester Physics Assignment For Grade 9
Instruction:
-Solve/Workout/ the Following Problems by Showing Your
Step
1. A periodic wave shown in the figure below is traveling in the positive
x-direction.
Find: A/ The amplitude of the wave B/Wave length of the wave
C/ Frequency of the wave D/ Period of the wave E/ Speed of the wave if it
takes total time of 0.08second
. (5 points)
Answer
Sem
30cm
X-axis
2. A pendulum whose length is 1m oscillation 30 times per minutes in
particular location. What is the
acceleration of the gravity there? (2
points)
3. When 25grames mass is attached to one
end of a spring of spring constant
400N/m. if the object is undergoing
periodic motion on smooth horizontal
surface what is period of oscillation? (1 point)
4. A force of 20N causes a spring to extend by 40mm. Find a spring constant of
the spring in N/m. (1 point)
5. In a test to measure the depth of Lake Langano a student on the boat send
ultrasonic pulse. The pulse took 0.2second to travel from the boat to the bed
of the lake and back to the boat. What is the depth of Lamgano as measured
by the student? Take the speed of sound in the Lake 340m/s. (1 point)
​