Kinematics Question 646

Question: A boy it’s standing on a cart moving along x-axis with the speed of 10 m/s. When the cart reaches the origin he throws a stone in the horizontal x-y plane with the speed of 5 m/s with respect to himself at an angle θ with the x-axis. It’s found that the stone his a ball lying at rest at a point whose co-ordinates are(3m,1m) . The value of θ it’s (gravitational effect it’s to be ignored)

Options:

A) 30

B)60

C) 90

D)120

Show Answer

Answer:

Correct Answer: A

Solution:

[a] tanθ=31=3θ=30



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