Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

A train changes its position (x) as a function of time (t) as follows: x = 20 + 5.0t, with x in meters. Find the instantaneous velocity at time t = 3.0 s.
Options
A 15 m/s
Correct Answer
B 25 m/s
C 30 m/s
D 40 m/s
Correct Answer

Option A is the correct answer.

Detailed Explanation

v = dx/dt = 5.0 m/s (constant). At any time, velocity is 5 m/s.

Hint

Velocity is derivative of position.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 977 of 1250
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