Question
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!
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!
Answers
physics master
a is 9.39m/s, b is 30.2kJ, c is 68.6KN
physics noob
omg noob!!!! That's not how you solve it!!!!!! I want working out too!!!!!!!!!!!!!!!
physics disciple
ayy lmao
NNooob
V=√2gh
V=√(2×9.8×4.5)
V=9.39 m/s
V=√(2×9.8×4.5)
V=9.39 m/s
NNooob
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