Perfectly Elastic Collision
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A pendulum bob of mass M is raised to a heighth and then released. At the bottom of its swing, itpicks up a mass m. To what height will thecombined mass rise?MSM2hm2h(2) (m+M)(1)(m+MmMhmMh(4)(3) (m+M)(m+M)
The two balls shown in figure are identical, the first moving at a speed v towards right and the second staying at rest. The wall at the extreme right is fixed. Assume all collisions to be elastic. Show that the speeds of the balls remain unchanged after all the collisions have taken place.
True
False
Rank the following velocities according to the kinetic energy a particle will have with each
velocity, greatest first: (i) →v=4^i+3^j (ii) →v=−4^i+3^j (iii) →v=−3^i+4^j (iv) →v=3^i−4^j (v) →v=5^i (vi) →v = 5ms at 30∘ to the horizontal.
(i) > (ii) > (iii) > (iv) > (v) > (vi)
(i) = (ii) = (iii) = (iv) = (v) = (vi)
(i) < (ii) < (iii) < (iv) < (v) < (vi)
(i) > (ii) = (iii) = (iv) > (v) > (vi)
n small balls, each of mass m, impinge elastically each second on a surface with velocity u. The force experienced by the surface will be
mnu
2 mnu
4 mnu
12 mnu
![419848_d5a1f14eb4094ed8acedab3ab8cc785c.png](https://search-static.byjusweb.com/question-images/toppr_ext/questions/419848_d5a1f14eb4094ed8acedab3ab8cc785c.png)
A particle of mass moving with a speed collide elastically with the end of a uniform rod of mass and length perpendicularly as shown in the figure. If the particle comes to rest after collision, find the value of .
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/855851/original_Picture3.png)
- 110 kgm/s
- 90 kgm/s
- −100 kgm/s
- 50 kgm/s
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/891520/original_collision_qstn_13.png)
- 2m√2ghcosθ
- 2m√ghcosθ
- 2m√2ghsinθ
- 2m√2gh
The track shown in figure is frictionless. The block B of mass 2m is lying at rest and the block A of mass m is pushed along the track with some speed. The collision between A and B is perfectly elastic. With what velocity should the block A be started to get the sleeping man awakened?