831. The relativistic mechanics is the field of study in which objects move with the velocity?
A. Less than C
B. Greater than C
C. Equal to C
D. That approaches C
832. Which is not associated with random error?
A. Inconsistent errors
B. Based on an unknown reason
C. The average of many readings can reduce it
D. Consistent difference in readings
833. In an inelastic collision?
(A) Kinetic Energy is less after the collision
(B) Momentum is less after the collision
C) Kinetic Energy is more after the collision
(D) None of the above
834. A ball is dropped from a height of 4.2 meters. To what height will it rise if there is no loss after rebounding?
(A) 4.2m
(B) 8.4m
(C) 12.6m
D) None of the above
835. When there is no loss of kinetic energy and momentum, then the collision is called?
(A) Elastic collision
B) Inelastic collision
(C) Inertial collision
(D) None of the above
836. In the case of an elastic collision between two bodies?
(A) Energy is conserved but momentum is not.
B) Momentum is conserved but energy is not.
(C) Both momentum and energy are conserved.
(D) Both momentum and energy are not conserved.
837. As the rocket moves upward during its job, its acceleration goes on?
(A) Decreasing
B) Increasing
(C) Remains the same
(D) It moves with uniform velocity
838. Rocket equation is given as?
(A) a=M/mv
(B) a=Mv/m
C) a=mv/M
(D) a=m/Mv
**839. A bomb of mass 12 kg initially at rest explodes into two pieces of masses 4 kg and 8 kg. The speed of
the 8 kg mass is 6 m/s. The kinetic energy of the 4 kg mass is?**
(A) 32 J
(B) 48 J
(C) 114 J
D) 288 J
840. A bombshell explodes into four equal parts. Which of the following is conserved?
(A) Kinetic energy
(B) Linear momentum
C) Linear momentum and Total energy
(D) Neither linear momentum nor total energy
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