A Block Is on a Frictionless Table,on Earth $\mathrm { s }^2$

Multiple Choice

A block is on a frictionless table,on earth.The block accelerates at 3.0 m/ $\mathrm { s }^2$ when a $20 \mathrm {~N}$ horizontal force is exerted on it.The block and table are set up on the Moon,where the acceleration of objects due to the gravitational attraction is 1.62 m/ $\mathrm { s }^2$ The weight of the block on the Moon is closest to

A) 11 N.
B) 9.5 N.
C) 8.1 N.
D) 6.8 N.
E) 5.5 N.