A worker must move a crate that can be either pushed or pulled, as shown in Figure 4. The worker can exert a force of 3.6 x 10° N. The crate has a mass of 45 kg. The worker can push or pull the crate at an angle of 25°, and the coefficient of kinetic friction between the floor and the crate is 0.36. The worker wants to move the crate as quickly as possible, but he does not know whether it is better to push or pull (a) Calculate the acceleration when pushing the crate. (b) Calculate the acceleration when pulling the crate. (c) Evaluate your answers to (a) and (b). Does it matter whather the worker pushes or puls the crate? Explain

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