A boy of mass 60kg jumps off a truck of mass 140kg travelling at 7.7m/s. If the boy runs towards the truck with a velocity of 2.5m/s, calculate (a) the momentum of the truck before the boy jump off
(b) The momentum of the boy on jumping off the truck
(C)the loss of kinetic energy the moment the boy jumped off.

More solar radiation is absorbed by earth’s surface than by

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.6 m below the tank bottom which is a = 6.7 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute). report your answer in meters to two decimal places.

The ability to make things happen is also called a. heat b. force c. matter d. energy