PDF chapter test TRY NOW

Read the statement and reason and check whether both of them are right:
 
1)
Statement: Riding a bicycle in cement surface is difficult when compared to riding it in a rough and tough surface.
 
Reason: Friction in smoother surface is greater when compared to friction in rougher surface.
 
Are both the statement and reason given correct?
 
2)
Statement: Oil, grease are used as lubricants in machineries.
 
Reason: Fluids such as oil, grease has high viscosity, hence can reduce the friction.
 
Are both the statement and reason given correct?