(b) What is the tangential linear acceleration of the end A of the rod when the rod is horizontal? The moment of inertia of a rod about one end is ML²/3.

IV. Essay questions: 1. Using songs in the EPL (English as a Foreign Language way to make learning more interesting and memorable for students of all levcls. Please illustrate some tips on how to incorporate songs into your English lessons in a way that can help your students improve their listening, speaking and overall comprehension skills. (20%) 2. You're in the middle of a lesson and find that some students are sleeping. Others are eating as it's almost lunch time. What's worse, some of them have been using their cell phones for quite some time. What frustrates you the most and how will you deal with it? (10%)

(a) Find the minimum coefficient of static friction at the floor.

(b) the force exerted by the wall at this angle θ = 45°.

(a) What is the angular acceleration of the rod when it is at angle O to the vertical.

(a) at constant volume；

(b) at constant pressure?

(c) What is the work done by the gas in part (b)?

(a) the amplitudes of the electric and magnetic field strengths, and

(b) the energy incident normally on a square plate of side 10 cm in 5 min.

(a)What is the de Broglie wavelength of an electron accelerated from rest by a potential difference of 150 V?