Factors Affecting the Resistance of a Conductor (comics)

2024PPp1q6 Ball falling with inital velocity greater than terminal velocity

Instead of the usual ball release from rest, this question states that the ball has an initial velocity greater than terminal velocity in the air.

There are a few scenarios which are possible.

• object moving in vacuum at high speed entering air (e.g. meteor entering Earth's atmosphere)

• object is thrown down from a high altitude at high speed

• parachute is opened and the speed decreases till terminal velocity

• stone falling with high speed in air hits the water and speed decreases

• etc

View the video for the explanation.

Question: 2024PPp1q6

Answer: Option A

Video 03 - Finding resultant velocity on boat or plane with wind (updated)

Instead of the usual vector diagram involving forces, these questions involve speed in a specific direction, which is velocity.

Velocity is a vector quantity, which has both magnitude and direction.

Hence we can apply the vector diagram (parallelogram method or tip-to-tail method) to these questions.

Question 01

Answer: Option A

Question 02: 2012P1Q2

Answer: Option A

Question 03: 2021PPp1Q1

Answer: Option C

Similar type of questions:

https://www.sgphysicstuition.com/post/video-01-how-to-find-resultant-force-of-two-or-three-forces-without-drawing-vector-diagram

https://www.sgphysicstuition.com/post/video-02-finding-resultant-force-from-vector-diagram-provided