A shopper pushes a cart 40.0 m south down one aisle and then turns 90.0° and moves 15.0 m. He then makes another 90.0° turn and moves 20.0 m. Find the shopper’s total displacement.

Explanation:

Find the diagram attached for the schematic diagram of motion of the cart. The displacement of the cart is the length AD.

To get the length AD, we will apply Pythagoras theorem on ΔAED.

According to the theorem:

AD² = AE²+ED²

AD² = 20²+15²

AD² = 400+225

AD² = 625

AD = √625

AD = 25.0m

Hence the shopper’s total displacement is 25.0m

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