A student fires a cannonball diagonally at an angle of 71° with an initial speed of 31m/s. Neglect drag and the initial height of the cannonball.

What was the cannonball's initial horizontal speed?

What was the cannonball's initial vertical speed?

How long did the cannonball rise?

What was the cannonball's total flight time?

What was the cannonball's maximum height?

How far from the cannon did the cannonball land (measured along the ground)?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.