Resultant Force I
Frictional Force
Sounds and Hearing
Identify the types of "pitch and loudness"
Random Questions 🤩
100
What is the unit for measuring force?
Newton (N)
100
What is the frictional force?
Frictional force is the opposite force.
100
What are the 2 properties of sound?
Pitch and loudness
100
A small size of vibration at the long distance.
Soft sound
100
Which type of surface makes the car move fastest?
A. sandy track B. pebble road
C. concrete D. water
C. concrete
200
What is a tool used to measure force?
Spring scale
200
What factor can affect the size of the frictional force?
weight / surface
200
What is the unit of pitch?
Hertz (Hz)
200
A big size of vibration at the short distance.
Loud sound
200
What happens when a heavy object moves?
It moves slower.
300
What is the resultant force?
The sum of all forces acting on object
300
What are 2 types of surface?
Smooth and rough
300
What is the unit of loudness?
decibel (dB)
300
It has a lot of vibration and high frequency.
High pitch sound
300
Which one is the high pitch sound?
a. lion's sound
b. bird's sound
c. man's sound
d. breaking glass sound
e. bass drum sound
b. bird's sound
d. breaking glass sound
400
What happens if two forces are equally acting in the opposite direction?
The object will not move
400
What are 2 types of weight?
Heavy and light
400
What is noise pollution?
Noise is the unwanted or disturbing sound.
400
It has a little vibration and low frequency.
Low pitch sound
400
Which one is the low pitch sound?
a. lion's sound
b. bird's sound
c. man's sound
d. breaking glass sound
e. bass drum sound
a. lion's sound
c. man's sound
e. bass drum sound
500
What is another name for resultant force?
Net force
500
What is not the advantage of friction?
a. making the engines work harder
b. holding a pencil
c. designing shoes for sportsmen
d. stopping the fast-running car
a. making the engines work harder
500
What is NOT the way to protect our ears from noises?
A. Stay away from noisy places.
B. Make loud sound or slap your friend’s ear.
C. Listen to quieter sound and get used to it.
D. Wear earplugs when we are in a noisy place.
C. Listen to quieter sound and get used to it.
500
Examples are whistle sound, a bird’s sound, and a breaking glass sound.
High pitch sound
500
Sound cannot travel through the __________.
Vacuum! Vacuum = no air