A rocket is fired in a gravity-free environment in deep space. The rocket has an initial mass of 9500 kg and ejects gas with a velocity of 2450 m/s. The rocket fires for 4.40 s. Calculate the mass (in kg) of the gas that must be ejected in the time given to give the rocket an acceleration of 49.50 m/s2

An explosion breaks a 35.0-kg object into three parts. The object is initially moving at a velocity of 27.0 m/s due north. Part (1) has a mass m1 = 5.10-kg and a velocity of 58.0 m/s due west. Part (2) has a mass m2 = 5.50-kg and a velocity of 71.0 m/s due south. Find the direction of the velocity of part(3).

A 7760 kg space probe, moving nose-first toward Jupiter at 73.9 m/s relative to the Sun, fires its rocket engine, ejecting 83.0 kg of exhaust at a speed of 248 m/s relative to the space probe. What is the final velocity of the probe? Number Units

A 4900 kg open train car is rolling on frictionless rails at 18.6 m/s when it starts pouring rain. A few minutes later the car's speed is 15.4 m/s. What mass of water (in kg) has collected in the car?

Your answer is part A two-stage rocket moves in space at a constant velocity of +4150 m/s. The two stages are then separated by a small explosive char placed between them. Immediately after the explosion the velocity of the 1370-kg upper stage is +5910 m/s. What is the velocity (magnitude and direction) of the 2950-kg lower stage immediately after the explosion? Number IP Units m/s

Some species of jellyfish use jet propulsion to get around, a much gentler form of jet propulsion than squid use. A small jellyfish takes water into its bell; the total mass of jellyfish and water is 3.2 g. The jellyfish then rapidly ejects 1.3 g of water, achieving a speed of 0.070 m/s. What is the speed of the ejected water?

A 7.500 E+3-kg truck moving east at 10.3 m/s collides with a 2.500 E+3-kg car moving west at 35.0 m/s. The collision takes place over a time interval of 0.5 s. The car and the truck stick together after the collision. Find the force (in N) of the car on the truck during the collision. Call this force positive if it points to the east, and negative if it points to the west. (Could you give an explanation on how to transfer/ convert E +3)

An astronaut of mass 180 kgkg including his suit and jet pack (when the jet pack is FULL and no gas has been used yet) wants to acquire a velocity of 1.6 m/sm/s to move back toward his space shuttle.Assuming the jet pack can eject gas with a velocity of 60 m/sm/s , what mass of gas will need to be ejected?

A rocket with an initial mass of 1.56E6 kg is blasting-off. If the velocity of the expelled fuel is initially 3.11E3 m/s and it is being expelled at an initial rate of 9.40E3 kg/s, what is the initial acceleration during this lift-off?

An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 146 kg. The astronaut begins a space walk at rest, with a completely filled propulsion unit. During the space walk, the unit ejects some gas with a velocity of +44 m/s. As a result, the astronaut recoils with a velocity of -0.39 m/s. After the gas is ejected, the mass of the astronaut (now wearing a partially empty propulsion unit) is 165 kg. What percentage of the gas propellant was ejected from the completely filled propulsion unit?