The work done by the bulldozer is calculated by multiplying the force it applied (5000 N) by the distance moved (40 m) resulting in 200,000 J of work.
To calculate the work done by the bulldozer, we need to know the force it applied and the distance over which the force was applied. The calculation for work is the product of the force and the distance that the force moves an object in the direction of the force. However, in this case, the speed of the bulldozer (2.0 m/s) and the time (20s) are given. To find the distance, we can multiply speed by time, which gives us 2.0 m/s × 20 s = 40 meters. The work done is thus 5000 N × 40 m = 200,000 Joules (J).