2. (a) What is difference between a vector and scalar? Give two examples of each. (b) What is free fall? How is it different than a projectile motion, give two examples of each? 3. Solve following problems to the significant numbers and write in scientific notation using metric system. (a) 0.020 km + 2.00 m + 300 cm +5000 mm, (b) 140.4586 + 12.343 + 4.21 + 0.5, (c) 3.60 * 0.6 + 2.0 4. Use graphical method to find out resultant vector of given situation: A child started walking 2 m to North, then 2 m East, 5 m South, 5 m West, the 3 m North. Draw drawing to support your answer. 5. A Vector has components Ax = - 4.5 m/s^2 and Ay = - 2.5 m/s^2. (a) What is the magnitude of vector A? (b) What is the direction of A, CCW from the +y-axis? 6. A rocket has a takeoff speed of 95.0 m/s and requires 2055 m to reach that speed. Determine the (a) acceleration of the plane and the (b) time required to reach this speed. 7. Suppose that you are driving a car with 20 m/s in winter and then your car got skid to a stop in 10 s. Determine the skidding distance of the car (assume uniform acceleration). 8. A truck started with 8 m/s and then speeded up to reach at a certain place in 1 hr with 0.005 m/s 2. (a) What is its final speed? (b) How far will it go? 9. A basket was accidently dropped from the second floor of a height of 4 m. (a) Find out how long it will take to hit the ground. (b) What would be its velocity when it hits the ground? 10. Two right triangles have side "a" in common. "x" is the size of angle BAC. Find tan(x), sin(x), cos(x)