Find the speed of the package in Figure 7.4 at the end of the push, using work and energy concepts.

Data given in Figure 7.4

Strategy

Here the work-energy theorem can be used, because we have just calculated the net work, W_net, and the initial kinetic energy, 1/2mv₀². These calculations allow us to find the final kinetic energy, 1/2mv², and thus the final speed v.

Transcribed Image Text:

Fa 120 N app = m = 30.0 kg w N W f = 5.00 N d = 0.800 m