Please answer all questions

1			An auto travels at the rate of 25 km/h for 4.0 minutes, then at 50 km/h for 8.0 minutes, and finally at 20 km/h for 2.0 minutes. Find (a) the total distance covered in km and (b) the average speed for the complete trip in m/s.
			A)	(a) 540 km, (b) 642 m/s
			B)	(a) 12.5 km, (b) 38.6 m/s
			C)	(a) 10.7 km, (b) 126 m/s
			D)	(a) 9.0 km, (b) 10.7 m/s
2			A runner travels 1.5 laps around a circular track in a time of 50 s. The diameter of the track is 40 m and its circumference is 126 m. Find (a) the average speed of the runner and (b) the magnitude of the runner's average velocity. Be careful here; average speed depends on the total distance traveled, whereas average velocity depends on the displacement at the end of the particular journey.
			A)	(a) 3.8 m/s, (b) 0.8 m/s
			B)	(a) 2.5 m/s, (b) 1.3 m/s
			C)	(a) 0.8 m/s, (b) 3.8 m/s
			D)	(a) 75 m/s, (b) 200 m/s
3			During a race on an oval track, a car travels at an average speed of 200 km/h. (a) How far did it travel in 45.0 min? (b) Determine its average velocity at the end of its third lap.
			A)	(a) 9000 km, (b) 200 km/h
			B)	(a) 150 km, (b) zero
			C)	(a) 267 km, (b) 200 km/h
			D)	(a) 4.4 km, (b) 9000 km/h
4			A body with initial velocity 8.0 m/s moves along a straight line with constant acceleration and travels 640 m in 40 s. For the 40 s interval, find (a) the average velocity, (b) the final velocity, and (c) the acceleration.
			A)	(a) 4.0 m/s, (b) 8.0 m/s, (c) 0.6 m/s2
			B)	(a) 24 m/s, (b) 16 m/s, (c) 0.20 m/s2
			C)	(a) 16 m/s, (b) 24 m/s, (c) 0.40 m/s2
			D)	(a) 0.4 m/s, (b) 160 m/s, (c) 16 m/s2
5			A box slides down an incline with uniform acceleration. It starts from rest and attains a speed of 2.7 m/s in 3.0 s. Find (a) the acceleration and (b) the distance moved in the first 6.0 s.
			A)	(a) 2.22 m/s2, (b) 16 m
			B)	(a) 8.1 m/s2, (b) 2.7 m
			C)	(a) 0.3 m/s2, (b) 32.4 m
			D)	(a) 0.90 m/s2, (b) 16 m
6			An auto's velocity increases uniformly from 6.0 m/s to 20 m/s while covering 70 m in a straight line. Find the acceleration and the time taken.
			A)	0.1 m/s2, 5.4 s
			B)	2.9 m/s2, 10 s
			C)	5.4 m/s2, 3.5 s
			D)	2.6 m/s2, 5.4 s
7			A train running along a straight track at 30 m/s is slowed uniformly to a stop in 44 s. Find the acceleration and the stopping distance.
			A)	0.68 m/s2, 1320 km
			B)	1320 m/s2, 1978 km
			C)	-0.68 m/s2, 0.66 km
			D)	-0.03 m/s2, 1335 km
8			A marble dropped from a bridge strikes the water in 5.0 s. Calculate (a) the speed with which it strikes and (b) the height of the bridge.
			A)	(a) 1.96 m/s, (b) 49 m
			B)	(a) 49 m/s, (b) 120 m
			C)	(a) 123 m/s, (b) 245 m
			D)	(a) 24.5 m/s, (b) 24.5 m
9			A stone is thrown straight downward with initial speed of 8.0 m/s from a height of 25 m. Find (a) the time it takes to reach the ground and (b) the speed with which it strikes.
			A)	(a) 1.6 s, (b) 24 m/s
			B)	(a) 3.1 s, (b) 554 m/s
			C)	(a) 2.3 s, (b) 9.8 m/s
			D)	(a) 3.2 s, (b) 22.3 m/s
10			A bottle dropped from a balloon reaches the ground in 20 s. Determine the height of the balloon if (a) it was at rest in the air and (b) it was ascending with a speed of 50 m/s when the bottle was dropped.
			A)	(a) 98 km, (b) 2960 km
			B)	(a) 196 km, (b) 1960 km
			C)	(a) 0.49 km, (b) 1000km
			D)	(a) 2.0 km, (b) 0.96 km