A projectile is thrown upward with a velocity | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The initial velocity vector is $\vec{u} = v_0 \cos \alpha \hat{i} + v_0 \sin \alpha \hat{j}$.At the same horizontal plane,the final velocity vecto

Vedclass · Accepted Answer

$2 v_0 \sin \alpha$ vertically downwards

Vedclass · Answer

(B) The initial velocity vector is $\vec{u} = v_0 \cos \alpha \hat{i} + v_0 \sin \alpha \hat{j}$.At the same horizontal plane,the final velocity vector is $\vec{v} = v_0 \cos \alpha \hat{i} - v_0 \sin \alpha \hat{j}$.The change in velocity is $\Delta \vec{v} = \vec{v} - \vec{u}$.$\Delta \vec{v} = (v_0 \cos \alpha \hat{i} - v_0 \sin \alpha \hat{j}) - (v_0 \cos \alpha \hat{i} + v_0 \sin \alpha \hat{j})$.$\Delta \vec{v} = -2 v_0 \sin \alpha \hat{j}$.The magnitude of the change in velocity is $2 v_0 \sin \alpha$,and the negative sign indicates it is directed vertically downwards.

$A$ projectile is thrown upward with a velocity $v_0$ at an angle $\alpha$ to the horizontal. The change in velocity of the projectile when it strikes the same horizontal plane is

Similar Questions

$A$ particle has an initial velocity of $(3\hat i + 4\hat j) \; ms^{-1}$ and an acceleration of $(0.4\hat i + 0.3\hat j) \; ms^{-2}$. Its speed after $10 \; s$ is:

Assertion: In a circular motion,work done by centripetal force is not always zero.
Reason: If the speed of the particle increases or decreases in circular motion,then the net force acting on the particle does not remain towards the centre.

$A$ particle is in uniform circular motion. Related to one complete revolution of the particle, which among the statements is incorrect?

$A$ particle of mass $M$ is moving in a horizontal circle of radius $R$ with uniform speed $v$. When the particle moves from one point to a diametrically opposite point,its

$A$ particle is performing a uniform circular motion along a circle of radius $R$. In half the period of revolution,its displacement and distance covered are respectively:

Vedclass Test Series

Exam Paper Generator

Online Exam Module