Kinematics

JEE Main 2015 Papers › Mechanics questions › Kinematics

The x and y co-ordinate of the moving body are x=3t²and y=5t²
(A)velocity of the body is making angle tan^-153 with +ve x-axis
(B)the angle between velocity and acceleration is 0^o
(C)the path followed by the body is a straight line
(D)the body is moving along circular path
(this is a multiple correct answer question....i am getting (a) and (b) as the correct answer.....but my answer is wrong!!!!!)

#Physics #Mechanics

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3 Answers

21

Anirban Mukherjee ·2012-06-20 05:47:48

Solve using vectors...Its simple!!
Let the p.v be r= 3t² i+5t² j..
Now differentiate and solve...Hope u understood

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158

Anik Chatterjee ·2012-06-24 02:49:27

ya....but....is (b) correct??

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71

Vivek @ Born this Way ·2012-06-24 03:15:12

Take dot product to find out the angle and check.

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Your Answer

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° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω