SATHEE: Motion in a Plane - Result Question 30

Motion in a Plane - Result Question 30

33. The velocity of a projectile at the initial point $A$ is $(2 \hat{i} + 3 \hat{j}) m / s$ . It’s velocity (in $m / s$ ) at point B is

[2013]

(a) $- 2 \hat{i} + 3 \hat{j}$

(b) $2 \hat{i} - 3 \hat{j}$

(d) $- 2 \hat{i} - 3 \hat{j}$

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Answer:

Correct Answer: 33. (b)

Solution:

(b) At point B the direction of velocity component of the projectile along $y$ -component reverses, while the $x$ -component remains unchanged.

Hence, ${\vec{V}}_{B} = 2 \hat{i} - 3 \hat{j}$

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Motion in a Plane - Result Question 30

33. The velocity of a projectile at the initial point A is (2i^+3j^)m/s. It’s velocity (in m/s ) at point B is

Answer:

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33. The velocity of a projectile at the initial point $A$ is $(2 \hat{i} + 3 \hat{j}) m / s$ . It’s velocity (in $m / s$ ) at point B is