10 Chapter - Numericals || 10th class physics || Simple harmonic motion and wave problems.
This video is related to 10 chapter ( simple harmonic motion and wave) numericals of 10th class physics.( Punjab textbook) @fanticer
0:06. 10.1. The time period of a simple pendul-
um is 2s. What will be its length on
the Earth? What will be its length on
the Moon if g(m)=g(e)/6? where
g(e) = 10ms-².
( 1.02 m, 0.17 m )
5:56. 10.2. A pendulum of length 0.99 m taken
to the Moon by an astronaut. The
period of the pendulum is 4.9s. what
is the value of g on the surface of
the Moon?
(1.63 ms-² )
8:35. 10.3. Find the time periods of a simple
pendulum of 1 metre length, placed
on Earth 🌎 and on Moon 🌝. The
value of g on the surface of moon is
1/6th of its value on Earth, where
g(e) = 10ms-².
( 2s, 4.9s )
12:07. 10.4. A simple pendulum completes one
vibration in two seconds. Calculate
it's length, when g= 10.0ms-².
( 1.02 m )
15:11. 10.5. If 100 waves pass through a point
of a medium in 20 seconds, what
is the frequency and the time
period of the wave? If its
wavelength of 3 cm. What is the
speed of the wave?
( 5 Hz, 0.2 s, 0.3 ms-¹ )
19:12. 10.6. A wooden bar vibrating into the
water surface in a ripple tank has
a frequency of 12 Hz. The resulting
wave has a wavelength of 3cm.
What is the speed of the wave?
( 0.36 ms-1 )
20:34. 10.7. A transverse wave produced on a
spring has a frequency of 190 Hz
and travels along the length of the
spring of 90 m, in 0.5s.
(a) what is the period of the wave?
(b) What is the speed of the wave?
(c) What is the wavelength of the
wave?
( 0.01 s, 180ms-¹, 0.95 m )
24:00. 10.8. Water waves in a shallow 🥘 dish
are 6.0 cm long. At one point, the
water moves up and down at a
rate of 4.8 oscillations per second.
(a) What is the speed of the water
waves?
(b) What is the period of the water
waves?
( 0.29 ms-¹, 0.21 s )
26:53. 10.9. At one end of a ripple tank 80cm
across, a 5 Hz vibrator produces
waves whose wavelength is
40mm. Find the time the waves
need to cross the tank.
(4s)
30:40. 10.10. What is the wavelength of the
radio waves transmitted by an
FM station at 90 MHz? where
1M = 10⁶, and speed of radio-
wave is 3×10⁸ ms-¹.
( 3.33 m)