Why do raindrops fall with constant speed during the later stages of their descent?
Answer: Air resistance just balances the force of gravity
Explanation
As a raindrop falls:
-
Initially, it accelerates due to gravity.
-
As its speed increases, air resistance (a drag force) also increases.
-
Eventually, a point is reached where the upward air resistance equals the downward gravitational force.
-
At this point, net force = 0, so acceleration stops, and the raindrop continues falling at a constant speed.
This constant speed is called terminal velocity.
This question appeared in
Past Papers (1 times)
Punjab University Admission Test Past Papers & Syllabus (1 times)
This question appeared in
Subjects (2 times)
EVERYDAY SCIENCE (2 times)
Related MCQs
- If a body moves with a constant speed in a circle:
- Who classified intellectual development into stages of sensorymotor, preoperational and operational stages?
- A body moving in a circular path with constant speed has?
- An object moving in a circle at constant speed ______?
- When young children express egocentric thought and language, which of the following stages are they in, according to Piaget’s stages of cognitive development?
- A flywheel rotates at a constant speed of 3000 rpm. The angle described by the shaft in radian in one second is ?
- The angle described by the shaft in radians in one second for a flywheel rotating at a constant speed of 3000 rpm is:
- A helicopter of mass 3×10³ kg raises vertically with constant speed of 2 m/s, what resultant force acts on it?
- A particle A has a charge +q and particle B has a charge +4q with each of them having the same mass m. When allowed to fall from rest through the same electrical potential difference, the ratio of their speed VA : VB will become _____?
- A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration of the particle is?