CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Newton's Second Law

A bullet of m...

Question

A bullet of mass 7g is fired into a block of metal weighing 7kg. The block is free to move. After the impact the velocity of the bullet and block is 70m/s.what is the initial velocity of the bUllet?

Open in App

Solution

Dear student,

Since no external force hence net momentum will be conserve.
$m_{1}$ $u_{1}$ + $m_{2} u_{2} = m_{1} v_{1 +} m_{2} v_{2}$ ( since final velocity of both particals are same hence $v_{1} = v_{2} = v (l e t)$ = 70m/s
$m_{1}$ $u_{1}$ + $m_{2} u_{2} = (m_{1} + m_{2}) v$
.007 $u_{1}$ + 0 = (7 + .007)*70
$u_{1}$ = 70070 m/s

Regards

Suggest Corrections

thumbs-up

0

Similar questions

Q. A bullet of mass 7 gm is fired into a block of metal weighing 7 kg. The block is free to move. Calculate the initial velocity of the bullet if the velocity of the block with the bullet in it is 0.7m/sec

Q. An 8 gm bullet is fired horizontally into a 9 kg block of wood and sticks in it. The block which is free to move, has a velocity of 40 cm/s after impact. The initial velocity of the bullet is

Q. A bullet of mass

m_{1}

is fired into a block mass

m_{2}

suspended like a pendulum. The block, initially at rest, is raised to a height h, after the impact. The velocity of the bullet is

Q. A 15 gm bullet is fired horizontally into a 3 kg block of wood suspended by a string. The bullet sticks in the block, and the impact causes the block to swing 10 cm above the initial level. The velocity of the bullet nearly is

1.25 - k g

wooden block rests on a table over a large hole as in Figure

P 9.71

5.00 - g

bullet with an initial velocity

v_{i}

is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum height of

22.0 c m

.
Calculate the initial velocity of the bullet from the information provided.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Newton's Second Law

PHYSICS

Watch in App

explore_more_icon

Explore more

Newton's Second Law

Standard X Physics

Join BYJU'S Learning Program

CrossIcon