1. A horizontal force of 100 N is applied to the block giving rise to an acceleration of 2 m/s2. A block lies on a horizontal friction less surface(s). The mass of the block (in kg) is nearly equal to:
a 0.02
b 50
c 200
d 100/9.8=10.2
e 102
2. The block sits on a table: the coefficient of kinetic friction between the block and table is 0.3. A force of 20 N is applied horizontally to a block of mass 5 kg. The acceleration of the block (in m/s2) is nearly equal to:
a 4.0
b 3.3
c 1.1
d 0.5