<p>You do not need to solve these problems. Please use your best judgement to estimate if the level of difficulty of these Physics problems is easier, harder, or on par with the AP Physics B Exam. I will post a few.</p>
<p>3.23 A ball is thrown vertically upward returns to its starting point in 4 s. Find its initial speed.</p>
<p>4.7 A 12.0-g bullet is accelerated from rest to a speed of 700 m/s as it travels 20 cm in a gun barrel. Assuming the acceleration to be constant, how large was the accelerating force?</p>
<p>7.59 A ski jumper glides down a 30 deg slope for 80 ft before taking off from a negligibly short horizontal ramp. If takeoff speed is 45 ft/s, what is the coefficient of kinetic friction on the slide?</p>
<p>18.21 How much heat must be removed by a refrigerator from 2 lb of water at 70 deg F to convert it to ice cubes at 10 deg F?</p>
<p>18.38 Water at 212 deg F weighing 7 lb is poured on a large block of ice at 32 deg F. How much ice melts?</p>
<p>21.22 If 150 L of nitrogen gas expands adiabatically starting at a pressure of 1 atm and the final volume is 250 L, what is the final pressure?</p>
<p>26.11 Determine the absolute potential in air at a distance of 3 cm from a point charge of 50 nC.</p>
<p>[Suppose these were Multiple Choice questions.]</p>