Now let’s apply the work–energy theorem to a more complex, multistep problem. In a pile driver, a steel hammerhead with mass 200 kg is lifted 3.00 m above the top of a vertical I-beam that is to be driven into the ground (Figure 1) . The hammer is then dropped, driving the I-beam 7.40 cm farther into the ground. The vertical rails that guide the hammerhead exert a constant 60.0 N friction force on it. Use the work–energy theorem to find (a) the speed of the hammerhead just as it hits the I-beam and (b) the average force the hammerhead exerts on the I-beam.
Part A - Practice Problem:
Suppose the pile is driven 11.4 cm instead of 7.4 cm. What force (assumed constant) is exerted on it?
Express the force in newtons to three significant figures.
mass of te hammerhead M=200kg
height lifted H=3 m
i beam into the ground h=7.4 cm
frinctional force og hammer F= 60 N
work energy theorem F*H + MHg=
Now let’s apply the work–energy theorem to a more complex, multistep problem. In a pile driver,...