Physics
Grade-9
Easy
Question
A 20 g particle moves in SHM with a frequency of 3 oscillations per second and an amplitude of 5 cm. The total distance does the particle move during one oscillation is:
- 10 cm
- 15 cm
- 20 cm
- 25 cm
Hint:
w=2πf=6π 
The correct answer is: 20 cm
f=3 oscillation per second
w=2πf=6π
In one oscillation the particle moves to one extreme from mean position comes back to mean and then to the other extreme and then to the mean, that means 4 times the amplitude. This accounts to 20 cm.
w=2πf=6π
In one oscillation the particle moves to one extreme from mean position comes back to mean and then to the other extreme and then to the mean, that means 4 times the amplitude. This accounts to 20 cm.
Related Questions to study
Physics
If a body is executing simple harmonic motion, then:
- At extreme positions, the total energy is infinite
- At extreme positions, the total energy is zero
- At the equilibrium position, the total energy is in the form of kinetic energy
- At the equilibrium position, the total energy is in the form of potential energy
If a body is executing simple harmonic motion, then:
PhysicsGrade-9
- At extreme positions, the total energy is infinite
- At extreme positions, the total energy is zero
- At the equilibrium position, the total energy is in the form of kinetic energy
- At the equilibrium position, the total energy is in the form of potential energy
Physics
Two simple pendulums of lengths 5 m and 20 m respectively are given small linear displacement in one direction at the same time. They will again be in the phase when the pendulum of shorter length has completed .... oscillations.
- 3
- 5
- 2
- 1
Two simple pendulums of lengths 5 m and 20 m respectively are given small linear displacement in one direction at the same time. They will again be in the phase when the pendulum of shorter length has completed .... oscillations.
PhysicsGrade-9
- 3
- 5
- 2
- 1
Physics
There are _______ complete oscillations are shown in the graph below.

- 3
- 2.5
- 3.5
- 4
There are _______ complete oscillations are shown in the graph below.

PhysicsGrade-9
- 3
- 2.5
- 3.5
- 4
Physics
Select the correct statement(s) from the following:
I. Motion of a satellite and a planet is periodic as well as SHM.
II. Mass suspended by a spring executes SHM.
III. Motion of a simple pendulum is always SHM.
- I, II, and III
- I only
- II only
- I and II
Select the correct statement(s) from the following:
I. Motion of a satellite and a planet is periodic as well as SHM.
II. Mass suspended by a spring executes SHM.
III. Motion of a simple pendulum is always SHM.
PhysicsGrade-9
- I, II, and III
- I only
- II only
- I and II
Physics
Which of the following statements is not correct for a particle executing simple harmonic motion?
Which of the following statements is not correct for a particle executing simple harmonic motion?
Physics
The periodic time of a body executing simple harmonic motion is 3 sec. After how many intervals from time t = 0, its displacement will be half of its amplitude:
-
sec
-
sec
sec
sec
The periodic time of a body executing simple harmonic motion is 3 sec. After how many intervals from time t = 0, its displacement will be half of its amplitude:
PhysicsGrade-9
-
sec
-
sec
sec
sec
Physics
Force acting in simple harmonic motion is always:
- Directly proportional to the square of the displacement
- Inversely proportional to the displacement
- Inversely proportional to the square of the displacement
- Directly proportional to the displacement
Force acting in simple harmonic motion is always:
PhysicsGrade-9
- Directly proportional to the square of the displacement
- Inversely proportional to the displacement
- Inversely proportional to the square of the displacement
- Directly proportional to the displacement
Physics
Choose the correct statement from the following:
Assertion: In oscillatory motion, displacement of a body from equilibrium can be represented by sine or cosine function.
Reason: The body oscillates to and from about its mean position.
- Assertion is correct, the reason is correct; the reason is not a correct explanation for assertion
- Assertion is incorrect, the reason is correct
- Assertion is correct, the reason is correct; the reason is a correct explanation for assertion
- Assertion is correct, reason is incorrect
Choose the correct statement from the following:
Assertion: In oscillatory motion, displacement of a body from equilibrium can be represented by sine or cosine function.
Reason: The body oscillates to and from about its mean position.
PhysicsGrade-9
- Assertion is correct, the reason is correct; the reason is not a correct explanation for assertion
- Assertion is incorrect, the reason is correct
- Assertion is correct, the reason is correct; the reason is a correct explanation for assertion
- Assertion is correct, reason is incorrect
Physics
The displacement time graph of a particle executing S.H.M. is as shown in the figure:

The corresponding force-time graph will be:
The displacement time graph of a particle executing S.H.M. is as shown in the figure:

The corresponding force-time graph will be:
PhysicsGrade-9
Physics
Assertion: All small oscillations are simple harmonic.
Reason: Oscillations of a simple pendulum system are always simple harmonic whether the amplitude is small or large.
- If both the assertion and reason are true but the reason is not the correct explanation of assertion.
- If the assertion is false but the reason is true.
- If both the assertion and the reason are true and the reason is the correct explanation of the assertion.
- If the assertion is true, but the reason is false.
Assertion: All small oscillations are simple harmonic.
Reason: Oscillations of a simple pendulum system are always simple harmonic whether the amplitude is small or large.
PhysicsGrade-9
- If both the assertion and reason are true but the reason is not the correct explanation of assertion.
- If the assertion is false but the reason is true.
- If both the assertion and the reason are true and the reason is the correct explanation of the assertion.
- If the assertion is true, but the reason is false.
Physics
Two simple pendulums of length 1 m and 16 m respectively are given small displacements at the same time in the same direction. The number of oscillations ‘N’ of the smaller pendulum for them to be in phase again is:
- 4 / 3
- 3 / 4
- 4
- 1 / 16
Two simple pendulums of length 1 m and 16 m respectively are given small displacements at the same time in the same direction. The number of oscillations ‘N’ of the smaller pendulum for them to be in phase again is:
PhysicsGrade-9
- 4 / 3
- 3 / 4
- 4
- 1 / 16
Physics
Select the true statement(s) about SHM.
I. Acceleration display style alpha displacement is a sufficient condition for SHM.
II. Restoring force display style alpha displacement is a sufficient condition for SHM.
- Both I and II are wrong
- II only
- I only
- I and II
Select the true statement(s) about SHM.
I. Acceleration display style alpha displacement is a sufficient condition for SHM.
II. Restoring force display style alpha displacement is a sufficient condition for SHM.
PhysicsGrade-9
- Both I and II are wrong
- II only
- I only
- I and II
Physics
What is constant in S.H.M.?
- Restoring force
- Potential energy
- Kinetic energy
- Periodic time
What is constant in S.H.M.?
PhysicsGrade-9
- Restoring force
- Potential energy
- Kinetic energy
- Periodic time
Physics
In a simple pendulum, the period of oscillation T is related to the length of the pendulum l as:
In a simple pendulum, the period of oscillation T is related to the length of the pendulum l as:
PhysicsGrade-9
Physics
Assertion: The amplitude of an oscillating pendulum decreases gradually with time
Reason: The frequency of the pendulum decreases with time.
- Assertion is correct, the reason is incorrect
- Assertion is incorrect, the reason is correct
- Assertion is correct, the reason is correct; the reason is not a correct explanation for assertion
- Assertion is correct, the reason is correct; the reason is a correct explanation for assertion
Assertion: The amplitude of an oscillating pendulum decreases gradually with time
Reason: The frequency of the pendulum decreases with time.
PhysicsGrade-9
- Assertion is correct, the reason is incorrect
- Assertion is incorrect, the reason is correct
- Assertion is correct, the reason is correct; the reason is not a correct explanation for assertion
- Assertion is correct, the reason is correct; the reason is a correct explanation for assertion