Question Detail

PHY 101 Kinematics in Two Dimensions Objective Question
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Question

If two objects are moving in opposite directions, the magnitude of their relative velocity is the
Options
A difference of their speeds.
B sum of their speeds.
Correct Answer
C product of their speeds.
D ratio of their speeds.
Correct Answer

Option B is the correct answer.

Detailed Explanation

When two objects move towards each other or away from each other along the same line, the velocity of one relative to the other is found by vector subtraction: V_AB = V_A - (-V_B) = V_A + V_B. The magnitude, therefore, is the sum of the magnitudes of their velocities.

Hint

Imagine two cars approaching each other head-on on a straight road. How fast is the distance between them decreasing?

Question Info

Course: PHY 101
Topic: Kinematics in Two Dimensions
Type: Objective
Difficulty: Not specified
Question 629 of 1250
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