What is the momentum of a 35 kilogram cart moving at a velocity of 1.2 meters per second? 42 kg(m/s)
70 kg(m/s)
420 kg(m/s)
700 kg(m/s)

Explain vector addition, triangle method and parallelogram method

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

Ascientific blank must be testable and capable of being proven false?