A Boat covers certain distance between two spots in a river taking t1 hrs going downstream and t2 hrs going upstream. What time will be taken by boat to cover same distance in still water? posted by STUTI Answer: Incoming search terms:relative velocity...

# Tag: search terms

## How can we define one Newton ?

How can we define one Newton? (Asked Pawas Rituja) One newton is defined as that force which when acts on a body of mass 1 kg produces an acceleration of 1 m/s^2 in it Incoming search terms:if you set up your pendulum atop mount everest would the period be less than the same as or greater thanit would [...]

## A simple numerical on momentum

Car mass is 1200 kg moving velocity is 108 km/hr. On applying brakes velocity reduced to 36 km/hr. Find change in momentum? (posted by Aditi) Answer: m=1200 kg u=108 x 5/18=30m/s v=36×5/18=10m/s Change in momentum = m(v-u) = 1200 x (30-10)=1200 ...