Work Energy And Power

Q: The balls, having linear momenta \vec{\mathrm{p}}_{1}=\mathrm{p}\hat{i} and \vec{\mathrm{p}}_{2}=-\mathrm{p}\hat{\mathrm{i}} , undergo a collision in free space. There is no extemal force acting on the balls. Let \vec{\mathrm{p}}_{1} and \vec{\mathrm{p}}_{2} be their final momenta. The following option(s) is (are) NOT ALLOWED for any non-zero value of \mathrm{p},\ \mathrm{a}_{1},\ \mathrm{a}_{2},\ \mathrm{b}_{1},\ \mathrm{b}_{2},\ \mathrm{c}_{1} and \mathrm{c}_{2} .

Since there is no net external force acting on the two body system, the net momentum of the system must remain conserved. The final momentum must not have any components in j and k directions as both momenta are in i direction. Hence options A and D are not possible.

Q: If collision between the block and the incline is completely elastic, then the vertical (upward) component of the velocity of the block at point B, immediately after it strikes the second incline is

After collision, vertical velocity will be vsin({ 30 }^{ 0 })cos({ 30 }^{ 0 })-vcos({ 30 }^{ 0 })cos({ 60 }^{ 0 })=0 .

Question

The balls, having linear momenta $p_{1} = p \hat{i}$ and $p_{2} = - p \hat{i}$ , undergo a collision in free space. There is no extemal force acting on the balls. Let $p_{1}$ and $p_{2}$ be their final momenta. The following option(s) is (are) NOT ALLOWED for any non-zero value of $p, a_{1}, a_{2}, b_{1}, b_{2}, c_{1}$ and $c_{2}$ .

Work Energy And Power

Physics 205 Views

If collision between the block and the incline is completely elastic, then the vertical (upward) component of the velocity of the block at point B, immediately after it strikes the second incline is

Physics
205 Views