Advantages and disadvantages of solar energy

What is the role of the ocular lens?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.