A particle of mass m is moving with a uniform velocity v1. It is given an impulse such that its velocity becomes v2. The impulse is equal to

 A particle of mass m is moving with a uniform velocity v1. It is given an impulse such that its velocity becomes v2. The impulse is equal to

NEET 1990

(a) m[|v2| − |v1|]

(b) 1/2 m (v2 ^2 - v1^2)

(c) m[v1 + v2]

(d) m[v2 − v1]

A block of mass m is placed on a smooth wedge of inclination θ. The whole system is accelerated horizontally so that the block does not slip on the wedge.The force exerted by the wedge on the block ( g is acceleration due to gravity) will be

A block of mass m is placed on a smooth wedge of inclination θ. The whole system is accelerated horizontally so that the block does not slip on the wedge.The force exerted by the wedge on the block ( g is acceleration due to gravity) will be [2004]

NEET 2004 

(a) mg/ cos θ

(b) mg cos θ

(c) mg sin θ

(d) mg

In carbon monoxide molecule, the carbon and the oxygen atoms are separated by a distance 1.12 × $10^{−10}$m. The distance of the centre of mass, from the carbon atom is

In carbon monoxide molecule, the carbon and the oxygen atoms are separated by a distance 1.12 × 10−10 m. The distance of the centre of mass, from the carbon atom is

(a) $0.64 × 10^{−10} m$

(b) $0.56 × 10^{−10} m$

(c) $0.51 × 10^{−10} m$

(d) $0.48 × 10^{−10} m$

[NEET 1997]

\[M\; r_{cm}=m_1 \; r_1 + m_2 \; r_2\]

\[\left (12u+16u \right) \; x = 12u \; (0) + 16u \left (1.12\times 10^{-10}\right)\]

\[x=0.64 \times 10^{-10}m\]