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
A particle has initial velocity and acceleration The magnitude of velocityafter 10 seconds will be...The figure shown the velocity time graph of a particle which moves along a straight line staring with velocity at 5 m /s...A particle leaves the origin an initial velocity = 3 m/s and a constant acceleration = (-1.0î - 0.5ĵ) m/s2 Its...Two spheres of same size, one of mass 2kg and other of 20kg are dropped simultaneously from the top of Qutub Minar (heig...Ratio of minimum kinetic energies of two projectile of same mass is 4 : 1. The ratio of the maximum height attained by t...