Question

A sledgehammer of mass m = 1.9 kg falls freely vertically downward from a height of h = 2.6 m at an initial speed of v = 11 m/s before striking a partially buried piling. After the blow the piling has moved d = 0.075 m deeper.How much kinetic energy, in joules, does the sledgehammer have just before striking the piling?

Answer 1

Kinetic energy= 114.9J

Step-by-step explanation:

Greetings !

Given values :-

mass= 1.9kg

height=2.6m

velocity= 11m/s

displacement (d)= 0.075m

Required value :-

Kinetic energy (KE)

Solution :-

Firstly, recall the Kinetic energy equation

`ke = (1)/(2) mv {}^(2)`

substitute known variables into the equation

`ke = (1)/(2) (1.9)(11) {}^(2)`

solve for Kinetic energy

`ke = 114.9j`

Hope it helps!!!