Question

1. A 30.00 kg mass moving with the velocity of 10 m/s. The momentum of the body will be A. 144.2 kg m/s. B. 187.8 kg m/s. C. 320.0 kg m/s. D. 442.4 kg m/s. E. None of the above 2. Out of the following which one is not a vector quantity? A. Force B. Impulse C. Mass D. velocity 3. Impulse is the product of which two quantities? A. Mass and Time B. Mass and Momentum C. Force and time D. Time and velocity 4. In any collision in an isolated system A. total momentum is not conserved. B. total kinetic energy is conserved. C. total momentum is conserved. D. total momentum is not conserved but total kinetic energy is conserved. E. total momentum and total kinetic energy are conserved and the masses are equal 5. Which has the maximum momentum? A. 10 kg at 5 m/s B. 20 kg at 2 m/s C. 100 kg at rest D. 5 kg at 50 m/s

Answer 1

The momentum of an object of mass m and Velocity v is, P: mv Given, m = 30.00 kg. V=10.0 m/s Thus ; momentum, p=mV = 30x10 kgm/s - 300 mkg/s. Answer : (E) None of the above 2 ) A vector quantity must posses both magnitude and Direction Answer: mass() The other three are veetor quantity:

3 ) Answer : ( Force and time Impulse is a product of force and time. 4) Answer : (9) Total momentum is conserved (5) momen tum of objeet A, PA = MV = 10x5 = 50 kyon is op B, Pip- MV = 20 X2 = 40 kg m/s cope, Pc = 100X0 = Omis. FORD, Po = 5X5o = 250 kgm/s. Answer : 0) 5 kg af 50m/s.
the answers are,

1) E = None of the above.

2) C = mass.

3) C = force and time.

4) C = total momentum is conseved.

5) D = 5 kg at 50m/s.

Explaination to question 4.

A system in which the only forces that contribute to the momentum change of an individual object are the forces acting between the objects themselves can be considered an isolated system. In an isolated system both energy and momentum is conserved but not the kinetic energy as there are elestic and inelastic collisions.