1.

If for a particle position x ∝ t2., then : (1) velocity is constant(2) acceleration is constant(3) acceleration is variable (4) none.

Answer»

Answer is (2) acceleration is constant

x ∝ t2 ⇒ x = kt2

⇒ ν = dx/dt = 2kt and a = dν/dt = 2k = const. 



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