Motion MCQs

Q1. A jogger starts at one corner of a rectangular park measuring 120 m by 80 m and walks once all the way around back to that same corner. What is the magnitude of its displacement for this complete round?

• A.240 m
• B.0 m
• C.200 m
• D.400 m

Answer: B. 0 m

A complete loop ends at the starting point, so the straight-line gap between start and finish is zero. Displacement = 0 m, while the distance covered equals the perimeter 2*(120 + 80) = 400 m.

Q2. After moving along every edge of a rectangular yard that is 90 m long and 70 m wide, A security guard ends the trip at the very corner it began from. What displacement has it undergone?

• A.180 m
• B.320 m
• C.160 m
• D.0 m

Answer: D. 0 m

A complete loop ends at the starting point, so the straight-line gap between start and finish is zero. Displacement = 0 m, while the distance covered equals the perimeter 2*(90 + 70) = 320 m.

Q3. A toy car completes a single full lap of a rectangular table top whose sides are 60 m and 40 m, finishing where it started. What is its net displacement over that lap?

• A.100 m
• B.200 m
• C.0 m
• D.120 m

Answer: C. 0 m

A complete loop ends at the starting point, so the straight-line gap between start and finish is zero. Displacement = 0 m, while the distance covered equals the perimeter 2*(60 + 40) = 200 m.