The dotted line shows the path of a competitor in a ski-jumping competition. [Figure showing ski-jumper's path] Ignoring air resistance, which graph best represents the variation of his speed v with the horizontal distance x covered from the start of his jump at P before landing at Q?

A bullet is fired horizontally with speed v from a rifle. For a short time t after leaving the rifle, the only force …

In an experiment to determine the acceleration of free fall g, a ball bearing is held by an electromagnet. When the c…

A sprinter runs a 100 m race in a straight line. He accelerates from the starting block at a constant acceleration of…

(a) (i) Define radioactive decay constant. (ii) Show that the decay constant λ is related to the half-life t_½ of a r…

A wave has a frequency of 5 GHz. What is the period of the wave?

At temperatures close to 0 K, the specific heat capacity c of a particular solid is given by c = bT³, where T is the …