A 600kg lifts starts from rest. It moves upward for 3.00 s with a constant acceleration until it reaches its final speed of 1.55 ms^-1 . calculate the force exerted by lift motor

We know that,

Force = mass× acceleration

We already have mass so let us calculate accleration experienced by it, using first equation of motion;

v = u + at1.55 = 0 + a(3)1.55 = 3a1.55/3 = a0.51 m/s² = a

Put this in force's formula;

f = maf = 600 × 0.51f = 306.00f = 306 N

Therefore, the force exerted by the lift is 306 N.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

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