A mild steel wire of length 1.0 m and cross sectional area 0.50 x 10-2 cm² is stretched, well
within its elastic limit, horizontally between
two pillars. A mass of 100 g is suspended
from the mid-point of the wire. Calculate the
depression at the mid-point.

The answer is: 6.3mi got it right

English version

Choice a is correct.kinetic energy equation:     ke = (1/2)(m)(v²)this tells us that ke is directly proportional to mass and the square of velocity. in other words, the more mass and more velocity an object has, the more kinetic energy.if an object is sitting at the top of a ramp, there is no velocity and therefore no kinetic energy.     choices b and d are wrong.a golf ball has more mass than a ping-pong ball, so a ping-pong ball would have less kinetic energy than a golf ball rolling off the end of a ramp.     choice c is wrong.choice a is correct.

The equator is in the middle of the earth so it is the even alp lit between hemispheres. this means it has the even most split between day and night.