Hi this is physics 20

31) A car, initially travelling at uniform velocity. accelerates at a rate of +1.00 m/s for a period of 12.0 s. If the car travelled + 190 m during this 12.0's period, what was the velocity of the car when it started to accelerate? A. +2.32 m/'s B. +4.74 m/'s Work 19.83 m's D. +15.3 m/'s E +19.6 m/s 32) The driver of a truck travelling at +60.0 km/h steps on the brakes and stops in 4.00s. While braking the acceleration of the truck is: -5.20 m/s2 Work: B -4.20 m/s2 C. +4.20 m/s2 D. +5.20 m/s 33) A rock is thrown downward off a bridge. It strikes the water at 55.0 m/'s. If the bridge is 20 m high, what was the initial speed of the rock? A. 10 m/s Work: B. 17 m's C. 35 m/s (D.) 51 m/s OUTREACH PROGRAMS Physics 20- Module I 34