Figure represents the displacement-time graph of motion of two cars A and B. Find the velocities of car A and car B.

Engineering

Physics Foundation

Circular Motion

Question

v_A = 40 kmh^–1,v_B= 20 kmh^–1

v_A = 20 kmh^–1,v_B= 40 kmh^–1

v_A = 10 kmh^–1,v_B= 20 kmh^–1

v_A = 20 kmh^–1,v_B= 10 kmh^–1

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For the time interval of 4h,
Displacement of car A, D_A = 160 km

$Velocity of car A, v_{A} = \frac{160 km}{4 h} = 40 km / h$

Displacement of car B, D_B = 120 km – 40 km = 80 km

$Velocity of car B, v_{B} = \frac{80 km}{4 h} = 20 km / h$

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