2. A ball is thrown vertically upwards. Whichof the following graphs r

1.	2. A ball is thrown vertically upwards. Whichof the following graphs represents thespeed (v)-time (t) graph of the ball duringits height of the air resistance is notignored?VA8
Answer» Explanation: Given AIR resistance is not ignored.Taking downward as positive y direction. Equation of MOTION for upward motion, mg−kv=ma, where kv is the air drag. Downward motion, mg+kv=−m ∂t ∂v SOLVING the equation gives us an EXPONENTIAL function i.e a function which is not linear Hence FOURTH graph is most appropriate

2. A ball is thrown vertically upwards. Whichof the following graphs represents thespeed (v)-time (t) graph of the ball duringits height of the air resistance is notignored?VA8

Answer»

Explanation:

Given AIR resistance is not ignored.Taking downward as positive y direction.

Equation of MOTION for upward motion,

mg−kv=ma, where kv is the air drag.

Downward motion,

mg+kv=−m

∂t

∂v

SOLVING the equation gives us an EXPONENTIAL function i.e a function which is not linear

Hence FOURTH graph is most appropriate

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2. A ball is thrown vertically upwards. Whichof the following graphs represents thespeed (v)-time (t) graph of the ball duringits height of the air resistance is notignored?VA8​

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2. A ball is thrown vertically upwards. Whichof the following graphs represents thespeed (v)-time (t) graph of the ball duringits height of the air resistance is notignored?VA8