KinematicsHard
Question
A bomb of mass 3.0kg explodes in air two pieces of masses of masses 2.0kg and 1.0 kg. The smaller mass goes at a speed of two fragments is:
Options
A.1.07kj
B.2.14kj
C.2.4kj
D.4.8kj
Solution
Applying conservation of momentam
2 v = 1 ×80
v = 40 m/sec
total energy of pieces
× 2 × 40 × 40 + × 1 × 80 × 80
= 1600 + 3200 = 4800 J = 4.8kj
2 v = 1 ×80
v = 40 m/sec
total energy of pieces
× 2 × 40 × 40 + × 1 × 80 × 80 = 1600 + 3200 = 4800 J = 4.8kj
Create a free account to view solution
View Solution FreeMore Kinematics Questions
The position (x) of a particle at any time (t) is given by x(t) = 4t3 - 3t2 + 2 The acceleration and velocity of the par...A particle is projected from a horizontal plane (x - z plane ) such that its velocity vector at time to is given by = a&...A particle is dropped from a height h . Another particle which was initially at a horizontal distance ‘d’ from the first...A motor drives a body along a straight line with a constant force. The power P developed by the motor must vary with tim...The position of a particle moving along x-axis depends on time as x = 2(1 - e-3t). Choose the INCORRECT statement....