My summer class is moving rapidly. Must I admit rapidly without me!HELP! We are

Question

My summer class is moving rapidly. Must I admit rapidly without me!HELP! We are currently working on forces and weight. The questionon my homework was: A block is on a frictionless table, on earth. The blockaccelerates at 8.7 m/s2 when a 20N horizontal force is applied toit. The block and table are set up on the moon. The accelerationdue to gravity at the surface of the moon is 1.62m/s2. The weightof the block on the moon is how many Newton? Do I use Force = mass x acceleration?? HELP! A block is on a frictionless table, on earth. The blockaccelerates at 8.7 m/s2 when a 20N horizontal force is applied toit. The block and table are set up on the moon. The accelerationdue to gravity at the surface of the moon is 1.62m/s2. The weightof the block on the moon is how many Newton? Do I use Force = mass x acceleration?? HELP!

Explanation / Answer

using second law of Newton F=ma m=F/a =20/8.7 so m=2.3Kg (the mass would be same on the moon as mass isinvarient for massive object but not for very light bodies) weigt on the earth   w=mg=2.3*9.8=22.5N the value of g on the massss is 6 times less than that ofearth so dividethe 22.5/6 w on moon= 22.5/6=3.75 N

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