A PhysCast on centre of mass.

In Figure (a), two identical retangular rods of metal are welded end to end, with T1 = 0 degrees C a left side and T2 = 1-- degrees C on the right side. In 2.0 min 10 J is conducted at a constant rate from the right to left side. How much time would it take ot conduct 10 J if the rods were welded side to side as in Figure (b).

We are going to look at a problem that is an example of a 2-d vector calculation. A cyclist travels along a horizontal road and 5.5 m/s. A strong wind blows from one side for 1 minute, after which the cyclist is moving at 7.0 m/s at an angle of 12 degrees to their intial direction. What was their average acceleration while the wind blew?

This PhysCast has a 1 dimensional motion problem with constant acceleration. You rush on to the train station platform, but your train is already leaving. You stop and watch as two of the 8.0 m train carriages move past you. The first one takes 1.6 s to go by and the next one takes 1.0s. Calculate the acceleration of the train, assuming it is constant.

A 0.20 kg puck upon a frictionless ice surface is acted on by the forces shown in the diagrams. Find the resulting accelerations?

This PhysCast deals with simple harmonic motion where dampening is present. The amplitude of a lightly damped oscillator decreases by 3.0% during each cycle. a) What percentage of the mechanical energy is lost in each cycle? b) What is the dampening coefficient for the 100 g mass if the cycle time is 1 sec?

This PhysCast explores the mathematics of simple harmonic motion.

This PhysCast is about the first law of thermodynamics. A closed by uninsulated container at room temperature containing 1 kg of water is shaken violently until the temperature rises by 5 degrees C. The mechanical work required in the process is 22 kj. a) How much heat is transferred during the shaking? b) How much mechanical energy would have been required had the container been perfectly insulating?

This question is about rolling motion and conservation of energy. A solid sphere and a silid disc with identical masses and radii roll down a slope without slipping. Using energy considerations, which has the greatest velocity when it reaches the bottom of the slope.

This question is about energy and rotational motion. A bowler bowls a 160g cricket ball with a diameter of 7cm with a linear velocity of 144km/h. The ball is measured to rotate at 22250 r.p.m. What proportion of the ball's kinetic energy is rotational?