RRB ALP GK Questions 2026

In free fall all the potential energy turns into kinetic energy, so 625 J = ½ × 0.32 kg × v², which gives v = 62.5 m/s. First change the mass into kilograms: 320 g = 0.32 kg.

When a wire is stretched its volume stays the same, so the length must grow in the same ratio as the cross-sectional area shrinks.

For resistors in parallel the reciprocals add: 1/11 + 1/22 + 1/33 = 11/66 = 1/6, so the equivalent resistance is 6 Ω. Taking 66 as the common denominator, 1/11 becomes 6/66, 1/22 becomes 3/66 and 1/33 becomes 2/66.

In every real machine some of the work put in is used in overcoming friction between the moving parts and in lifting the parts of the machine itself, and that work leaves the system as heat and sound, so the work delivered to the load is always less than the…

A wedge is two inclined planes joined back to back, and an axe, a knife, a chisel and a nail all work on that principle: a force applied at the blunt end is turned into a much larger sideways force at the sharp edge, and the thinner and longer the…

The pitch of a screw is the distance between two consecutive threads measured along its axis, and it is also the distance through which the screw advances in one complete turn; the velocity ratio of a screw is the circumference of the circle described by the handle divided by the…

The velocity ratio of an inclined plane is the length of the slope divided by its vertical height, because the load is pushed along the whole slope while it is raised only through the height; here ten divided by two gives five, so in the ideal case an effort of…

In a single fixed pulley the rope that is pulled down moves exactly as far as the load rises, so the distance moved by the effort equals the distance moved by the load and the velocity ratio is one; the pulley gives no gain in force and is used only…

In a pair of tongs the joint is the fulcrum, the hand presses somewhere in the middle of the arms and the object held lies at the far end, so the effort is between the fulcrum and the load; the effort arm is shorter than the load arm, the mechanical…

In a wheelbarrow the wheel acts as the fulcrum, the load sits in the tray between the wheel and the hands, and the effort is applied at the handles, which is the arrangement of a second class lever; because the effort arm is always longer than the load arm, its…

A lever is a rigid bar turning about a fulcrum, and by the principle of moments the load multiplied by the load arm equals the effort multiplied by the effort arm, so a long effort arm lets a small effort balance a large load; this is the simplest way of…

Velocity ratio is defined as the distance moved by the effort divided by the distance moved by the load in the same interval of time, and because it depends only on the design of the machine it does not change with friction, unlike the mechanical advantage.

The velocity ratio is the distance moved by the effort divided by the distance moved by the load, that is ten divided by two point five, which is four.

Mechanical advantage is defined as the load divided by the effort, so the load is the mechanical advantage multiplied by the effort, that is three multiplied by fifteen, which gives forty-five units.

In para athletics every result carries a class written as a letter followed by a number: the letter T covers running and jumping events, so sprints, middle-distance races and the long jump in which Nishad Kumar won his gold medal are all written with a T, and the number names…

The Prime Minister said winning a gold medal on his debut in the men's long jump T47 made the achievement even more special, and he described Nishad Kumar's versatility, determination and sporting excellence as truly inspiring.

He won the men's long jump T47 gold medal at the Asian Para Games 2026 with what was described as an outstanding jump, and the Prime Minister noted that the title arrived on his debut in the event, which made it even more special.

Neither beta nor gamma emission changes the total number of protons and neutrons in a nucleus, so the mass number stays the same.

A light year is the distance that light travels in vacuum in one year at about 3 into 10 to the power 8 metres per second, which works out to roughly 9.46 into 10 to the power 12 kilometres; astronomers use it because distances between stars are awkward to write…

Visible light runs from about 400 nanometres at the violet end to about 700 nanometres at the red end, so violet has the shortest wavelength, the highest frequency and the greatest energy of the seven colours remembered as VIBGYOR.