recategorized by
0 votes
0 votes

A point mass having mass $M$ is moving with a velocity $V$ at an angle $\theta$ to the wall as shown in the figure. The mass undergoes a perfectly elastic collision with the smooth wall and rebounds. The total change (final minus initial) in the momentum of the mass is

  1. $-2MV \cos\theta \hat{j}$
  2. $2MV \sin\theta \hat{j}$
  3. $2MV \cos\theta \hat{j}$
  4. $-2MV \sin\theta \hat{j}$
recategorized by

Please log in or register to answer this question.

Answer:

Related questions

0 answers
0 votes
Arjun asked Feb 24, 2017
For the situation shown in the figure below the expression for $H$ in terms of $r$, $R$ and $D$ is $H=D+\sqrt{r^2+R^2}$$H=(R+r)+(D+r)$$H=(R+r)+\sqrt{D^2-R^2}$$H=(R+r)+\sq...
0 answers
0 votes
Arjun asked Feb 24, 2017
The surface irregularities of electrodes used in an electrochemical machining (ECM) process are $3 \: μm$ and $6 \: μm$ as shown in the figure. If the work-piece is of ...
0 answers
0 votes
Arjun asked Feb 24, 2017
A piston-cylinder device initially contains $0.4 \: m^3$ of air (to be treated as an ideal gas) at $100 \: kPa$ and $80^ \circ C$. The air is now isothermally compressed ...