Answer Happy

12) 1. what happens to its mechanical ente? A moring price is subject to conservative forces only. When its kinetic energy decres 10 It increases by 103 a b It decreases by 101 c It increases, but not necessarily by 10). d It decreases, but not necessarily by 10 e It remains the same 13) A 12 kg mass is projected from ground level with a velocity of 30 m' me nown angle shove the horisontal. A short time aber being projected the mass barely carsa 1mtali fence. Disregard air resistance and assume the ground is levd What is the energy of the mass as it dears the fence NOTE: K1=1000 0.35 kJ A b 0.73.13 0.40 kJ d 0.68 0.19 0 14) A 20kg blocksliding on a frictionless borisontal surface is attached to be end of a horizontal spring 600 Nm) which has its other end fixed. The speed of the block when the spring is extended 020 m is equal to 3. mu's. What is the maximum speed of this block as it oscillates! This is when the spring is fully relaxed) 46 m/s b 5.3 mus 5.7 ms d 49 m/s 3.5 m/s 15 A loty object is dropped from rest. After falling a distance of 50 m, it has a speed of 26 m's What is the change in mechanical en caused by the dissipative arrestive force on the object during this descens? (NOTE: k1000) -1.3 b. -1.5 c. -180 d. -2.00 -23 c.