What is the main topic of the first question discussed in the video?

• The motion of a pendulum in an elevator

• The motion of an object thrown at an angle with air drag

• The frequency of a simple harmonic oscillator

• The speed of a particle at maximum

Why does it take longer for the object to fall down from its highest point?

• Because the resistive force is greater on the way up

• Because the net force is smaller on the way down

• Because the object gains speed as it falls

• Because the gravitational force is stronger on the way down

What is the scenario described in the second question?

• An object thrown at an angle

• A particle moving in one dimension

• A pendulum in a stationary elevator

• A pendulum in an accelerating elevator

How does the period of a pendulum change when the elevator accelerates downwards?

• The period becomes longer

• The period becomes zero

• The period remains the same

• The period becomes shorter

What is the formula for the period of a pendulum in an accelerating elevator?

• 2π times the square root of l over (g - a)

• 2π times the square root of l over a

• 2π times the square root of l over (g + a)

• 2π times the square root of l over g

What is the main focus of the third question?

• The frequency of a simple harmonic oscillator

• The speed of a particle at maximum

• The motion of an object with air drag

• The period of a pendulum

What is the frequency in hertz of the simple harmonic oscillation described?

• 1/π

• 2/π

• 2π

• π

When is the speed of the particle at its maximum?

• When x is at its maximum

• When x is zero

• When x is at its minimum

• When the sine of 2t plus pi over four is at its maximum

What happens when the sine of 2t plus pi over four is zero?

• The particle is at rest

• The speed of the particle is at its minimum

• The particle changes direction

• The speed of the particle is at its maximum

What is the alternative method to find the maximum speed of the particle?

• Calculate the acceleration of the particle

• Calculate the position of the particle

• Calculate the velocity using cosine

• Calculate the velocity using sine