Please answer all questions.

1			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
2			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
3			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
4			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
5			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
6			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
7			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
8			A marble, rolling with speed 20 cm/s, rolls off the edge of a table that is 80 cm high. (a) How long does it take to drop to the floor? (b) How far, horizontally, from the table edge does the marble strike the floor?
			A)	(a) 4.0 s, (b) 4.0 cm
			B)	(a) 8.2 s, (b) 0.8 cm
			C)	(a) 0.16 s, (b) 1.6 cm
			D)	(a) 0.40 s, (b) 8.1 cm
9			A body projected upward from the level ground at an angle of 50° with the horizontal has an initial speed of 40 m/s. (a) How long will it take to hit the ground? (b) How far from the starting point will it strike? (c) At what angle with the horizontal will it strike?
			A)	(a) 3.1 s (b) 0.19 km (c) 90°
			B)	(a) 6.3 s (b) 0.16 km (c) 50°
			C)	(a) 4.1 s (b) 0.25 km (c) 40°
			D)	(a) 9.2 s (b) 0.08 km (c) 45°
10			A body is projected downward at an angle of 30° with the horizontal from the top of a building 170 m high. Its initial speed is 40 m/s. (a) How long will it take before striking the ground? (b) How far from the foot of the building will it strike? (c) At what angle with the horizontal will it strike?
			A)	(a) 8.3 s, (b) 0.084 km, (c) 90°
			B)	(a) 4.4 s, (b) 0.167 km, (c) 45°
			C)	(a) 3.1 s, (b) 0.086 km, (c) 30°
			D)	(a) 4.2 s, (b) 0.15 km, (c) 60°
11			A hose lying on the ground shoots a stream of water upward at an angle of 40° to the horizontal. The speed of the water is 20 m/s as it leaves the hose. How high up will it strike a wall which is 8.0 m away?
			A)	5.36 m
			B)	8.38 m
			C)	6.71 m
			D)	6.66 m
12			A ball is thrown upward at an angle of 30° to the horizontal and lands on the top edge of a building that is 20 m away. The top edge is 5.0 m above the throwing point. How fast was the ball thrown?
			A)	11 m/s
			B)	20 m/s
			C)	16 m/s
			D)	5230 m/s