a) Calculate the P.E. a pile driver has if it is raised 4.5 meters by a mechanical winch. If the 510
kilogram pile driver is allowed to fall freely, what would its velocity be at ground level.
b) A 4.2 kg mortar shell is fired out of a mortar with a velocity of 120 m/s. What is the kinetic
energy of the shell at this instant?
c) In a stamping machine the die has a mass of 35 kg and falls from a height of 2 m onto a metal block. If the depth of indentation is 10 mm find the average stamping force assuming
the die does not rebound.
please provide full answers much appreciated!
5 answers
a is 9.39m/s, b is 30.2kJ, c is 68.6KN
omg noob!!!! That's not how you solve it!!!!!! I want working out too!!!!!!!!!!!!!!!
ayy lmao
V=√2gh
V=√(2×9.8×4.5)
V=9.39 m/s
V=√(2×9.8×4.5)
V=9.39 m/s
a/ V=√2gh
V=√(2×9.8×4.5)
V=9.39
b/=> K.E= (mv^2)/2
=> K.E= (4.2 ×〖120〗^2)/2
=> K.E= 30240 J
=> K.E= 30.2kJ
c/
average force= (35×9.8×2)/0.01
ave.f=68600N
Ave.f= 68.6 KN
V=√(2×9.8×4.5)
V=9.39
b/=> K.E= (mv^2)/2
=> K.E= (4.2 ×〖120〗^2)/2
=> K.E= 30240 J
=> K.E= 30.2kJ
c/
average force= (35×9.8×2)/0.01
ave.f=68600N
Ave.f= 68.6 KN
0 answers