please answer all questions

8. Using L,M ]and T for the dimensions of length, mass and time, respectively, the dimensions of impulse are d) ML/T2 a) LT/M b) L/TM e) ML/T C) ML2/T2 9. If an arrow's speed and mass are both doubled, then its momentum and kinetic energy are respectively increase by factors of a) 2 and 2 d) 4 and 8 b) 2 and 4 e) 8 and 8 c) 4 and 4 10. When you catch a fast-moving baseball, your hand hurts less if you move it in the same direction as the ball because a) The change in momentum in the ball is less b) The change in kinetic energy of the ball is less c) The time interval of the interaction is less d) The time interval of the interaction is greater e ) The impulse on the ball is greater Short Answer - Neatly provide written responses 11. Is it possible for an object to receive a larger impulse from a small force than from a large force? Explain. [2 marks] 12. When a meteoroid collides with the Moon, the surface material at the impact site melts. Explain why. [2 marks]