Question Detail

PHY 101 Last Min Prep Objective Question
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Question

A stone is tossed straight upwards with initial positive velocity of 30 m/s. What is its instantaneous velocity and acceleration at the highest point of its trajectory?
Options
A Velocity = 0 m/s, Acceleration = 0 m/s²
B Velocity = 30 m/s, Acceleration = 9.8 m/s²
C Velocity = 0 m/s, Acceleration = 9.8 m/s²
Correct Answer
D Velocity = 30 m/s, Acceleration = 0 m/s²
Correct Answer

Option C is the correct answer.

Detailed Explanation

At the highest point, the stone momentarily comes to rest, so velocity = 0 m/s. Throughout the motion (neglecting air resistance), the acceleration due to gravity is constant at 9.8 m/s² downward.

Hint

Gravity always acts, even at the highest point.

Question Info

Course: PHY 101
Topic: Last Min Prep
Type: Objective
Difficulty: Not specified
Question 1232 of 1250
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