Practice free Motion in a Lane (Physics) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which of the following statements about uniform circular motion is true?
In 'POINTS TO PONDER', point 4 states: 'The kinematic equations for uniform acceleration do not apply to the case of uniform circular motion since in this case the magnitude of acceleration is constant but its direction is changing.'
The scalar product of two vectors $\vec{A}$ and $\vec{B}$ is given by $\vec{A}\cdot\vec{B} = AB\cos\theta$. Geometrically, $B\cos\theta$ represents the:
The NCERT text explains the scalar product: 'Geometrically, $B\cos\theta$ is the projection of B onto A in Fig.5.1 (b) and $A\cos\theta$ is the projection of A onto B in Fig. 5.1 (c). So, A.B is the product of the magnitude of A and the component of B along A.'
A bullet is fired from a gun at the speed of $280\ \text{m s}^{-1}$ in the direction $30^\circ$ above the horizontal. The maximum height attained by the bullet is ($g = 9.8\ \text{m s}^{-2},\ \sin 30^\circ = 0.5$):
$H_{\max} = \dfrac{u^2 \sin^2\theta}{2g} = \dfrac{280^2 \times (0.5)^2}{2 \times 9.8} = 1000\ \text{m}$.
A particle moving with uniform speed in a circular path maintains:
Velocity and centripetal acceleration both keep changing direction.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.