A ball is thrown with an initial velocity of U = (51+ m/s. When it reaches the top of

its trajectory, neglecting air resistance, what is its (2 point each).

a) Velocity?

b) Acceleration?​

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

The slope of a velocity time graph over any interval of time gives the during that interval

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 = 2.1 m below the tank bottom which is a = 7.4 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)