Question

18 18 ca 18.00 W. 10 m 3. Distance covered by a freely falling body in 4 seconds is. a). 4.9m b). 19.6m c). 39.2 m 78.4m 4. If the initial and the final velocities of a moving body are 30 cm/s and 3.70 m/s, respectively, then distance covered in 5 seconds will be a). Im b). 2 m c). 5 m 5. Two bodies of mass 4 kg and 6 Kg moving towards each other with velocities of 3ms and 2ms. The total momentum after collision will be. a) 24 NS b) 12 NS c). 48 NS d). 6. The total energy and momentum are conserved, but kinetic energy in not. al. Elastic collision b). Inelastic collision c). Both 'a' & 'b' d). None of these 7. A body is projected with a speed of 30 m/s at an angle of 30° with the vertical the time of flight is d). 3/5 8. The equations for mange, height and time of flight holds for angle of projection. a). 0 0 b). 8-90 c). 08 < 90° d). all of these a). 35 b). 3 c). 1312 9. If a projectile A is thrown horizontally at a speed V and another projectile B is thrown up with same at an angle of 30° which projectile covers greater distance on striking the ground. a). A b). B c). Both Covers same distance d). None of the 10. A body is thrown with the velocity Vat an angle with the horizontal. If the body remains in​

Answer 1

Answer:

Both momentum and kinetic energy are conserved quantities in elastic ... They collide, bouncing off each other with no loss in speed. This ...