Answer:
1500Joules
Step-by-step explanation:
Work done, denoted by W, can be calculated using the formula:
Work done (W) = force (F) × distance covered (d)
According to the information in this question, Mary pushes her cart across the floor with a force (F) of 150N for a distance (d) of 10m.
Hence, work done (W) by the cart is:
W = 150N × 10m
W = 1500 Newton.metre (N.m) or Joules (J).