A boy of mass 60kg jumps off a 4m roof. it is known that the boy has a velocity of of 8.85 m/s just before landing. What is the momentum of the boy just before landing?​

What happens in a global convection cell

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s

What is a good example of instantaneous speed