Quantity of motion of the body is known as __________________.
(a) Linear momentum
(b) Force
(c) Inertia
(d) Mass
Linear momentum =
(a) Mass x Velocity
(b) Mass x acceleration
(c) Mass x time
(d) Mass x density
Linear momentum has the direction of _____________________.
(a) Mass
(b) Velocity
(c) Both of them
(d) None of these
SI unit of momentum is
(a) kg.m.s^-1
(b) Ns
(c) Both of them
(d) None of these
Dimensions of momentum is
(a) [MLT^-1]
(b) [MLT^-2]
(c) [MLT^-3]
(d) [MLT^-4]
Time rate of change of momentum of a body equals the applied force. This is ____________.
(a) Newton’s first law of motion
(b) Newton’s second law of motion
(c) Newton’s third law of motion
(d) Newton’s law of gravitation
The momentum of an object is increased from 10 Ns to 20 Ns by the application of force for 1s. What is the magnitude of applied force?
(a) 10N
(b)20N
(c) 30N
(d)40N
Impulse =
(a) Force x Mass
(b) Force x Time
(c), Mass x Velocity
(d) Mass x Acceleration
A1500 kg car has its velocity reduced from 20 ms^-1 to 15 ms^-1 in 3s.How large was the average retarding force?
(a) -1000 N
(b) -1500 N
(c) -2000 N
(d)-2500N
The total linear momentum of an isolated system remains constant. This is known as law of conservation of __________________.
(a) Mass
(b) Energy
(c)Momentum
(d) None of these
For an isolated system of colliding bodies, the total change in momentum is__________.
(a) 0
(b) 1
(c) Infinity
(d) None of these
Two spheres of 2 kg and 3 kg masses are moving towards each other with velocities of 6 m/s and 4 m/s respectively, If the velocity of 3kg body after collision is3 m/s, what will be the velocity of 2 kg body after collision?
(d) 5.0 m/s
(a) 3.5 m/s
(b) 4.0m/s
(c) 4.5 m/s
A collision in which K.E of the system is not conserved, is called the _____________.
(a) Elastic collision
(b)Inelastic collision
(c) Plastic collision
(d) None of these
In the ideal case when no kinetic energy is lost, the collision is said to be perfectly
______________.
(a) Elastic
(b) Inelastic
(c) Plastic
(d) None of these
In inelastic collision .
(a) Momentum is conserved
(b) Total energy is conserved
(c) Both of them
(d)None of these
In elastic collision.
(a) Momentum is conserved
(b) Total energy is conserved
(c) Both of them
(d) None of these
Elastic collision conserves _______________.
(a) Momentum
(b) Kinetic energy
(c) Both of them
(d) None of these
Inelastic collision conserves _______________.
(a) Momentum
(b) Kinetic energy
(c) Both of them
(d) None of these
The magnitude of relative velocity of approach is equal to the magnitude of relative velocity of separation. This result is valid for ________________.
(a) Elastic collision
(b) Plastic collision
(c) Inelastic collision
(d) None of these