A test is conducted in which an 80 kg person sitting in a 15 kg cart is propelled by the j...

A test is conducted in which an 80 kg person sitting in a 15 kg cart is propelled by the jets emitted by two household fire extinguishers with a combined initial mass of 18 kg. The cross section of the exhaust nozzles is 3 cm in diameter, and the density of the exhaust is ρ = 1.98 kg/m3. The vehicle starts from rest, and it is determined that the initial acceleration of the “jet cart” is 1.8 m/s2. Recalling that the mass flow rate out of the nozzle is given by , where S is the area of the nozzle cross section and υo is the exhaust speed, determine υo at the initial time. Ignore any resistance to the horizontal motion of the cart.

Figure P5.121