A block of mass 2.6 kg is projected with initial speed 18 m s−1 along a rough horizontal plane. The dynamic coefficient of friction between the block and the plane is 0.35 .
a. a After how much time will the block stop?
b. b What distance will the block cover?
c. c Without further calculations, state how the answers to a and b would change, if at all, when the experiment is repeated with a block of double the mass.