Question

A 0.400 kg hammer is moving horizontally at 7.50 m/s when it strikes a nail and comes to rest after driving it 1.00 cm into a board. (a) Calculate the duration of the impact. (b) What was the average force exerted on the nail? Additional Materials Reading 12. -12 points OSColPhys1 8.P.002.WA. Two carts mounted on an air track are moving toward one another. Cart 1 has a speed of 0.8 m/s and a mass of 0.53 kg. Cart 2 has a mass of 0.71 kg. (a) If the total momentum of the system is to be zero, what is the initial speed of Cart 2 in meters per second? m/s (6) Does it follow that the kinetic energy of the system is also zero since the momentum of the system is zero? Yes O No (c) Determine the system's kinetic energy in joules in order to substantiate your answer to part (b). Supporting Materials Physical Constants Additional Materials Reading 3. -/2 points OSCIPhys1 8.P.005.WA. /s and a kinetic energy of 293 ). Determine the following. An object is traveling such that it has a momentum of magnitude 23.7 kgm (a) speed of the object in meters per second mys (b) mass of the object in kilograms

Answer 1

O as from rur zas ; v-u= at Winter 2 V+u = 047.5 = 2x1x10? by t = 2.7x16=sec Fxt = m (v-U) 9 F = 0.4(0-7.5) -- 1.1/X100%N F = 1.118103 2.78103