Question

PHYSIC : 2D Acceleration vectors

Question 2 (2d acceleration vectors) On a perfectly flat surface a toy car is at the origin and moving with the following velocity. It also moves under the following constant acceleration a. What is the position of the toy car at time equal 0 second. b. What is the position of the toy car after 1 second? c. What is the position of the toy car after 2 second? d. Is the car moving in a straight line?

Answer 1

V = 4 m/s i^^a = 2 m/s^2 i^^+ 5 m/s^2 j^^a = squareroot 2^2 + s^2 = 5.385 m/s^2 v = squareroot 4^2 = 4 m/s (a) t = 0, Position S = u t + 1/2 a t^2 S_0 = 4 times 0 + 1/2 times 5.385 times 0 = 0 t = 1 S_1 = 4 times 1 + 1/2 times 5.385 times (1)^2 S_1 = 6.69 m S_2 = 4 times 2 + 1/2 times 5.385 times (2)^2 S_2 = 18.77 (d) yes Because v only in x direction