Use the graphs below showing an object's position, x, over time, t, to answer the following question: Which graph pertains to an object that is at rest? (i) (ii) (iii) (iv) Oi O i i O iv none of these

What do you say is the length of a straight line from an object's initial position to its final position?

An Object has an accelration a(t)=(1,t) a) Determine the velocity of the object at time t if  it is known that v(0) is parallel to the x axis and that the speed of the object at t=0 is equal to its speed  at t=1. b)Determine the position of the object at time  t if it is known that the object is at the origin when t=1.

9) Train A passes Station 1 at the rate of 72 km/h and moves 20 km at this speed and then comes to rest at Station 2, 24 km away from Station 1. Train B starts from Station 1, in accelerating motion and then decelerating motion and finally reaches Station 2. Time taken by B is twice the time taken by A. Determine the maximum speed attained by B. The V-t diagram representing the movement of the trains is shown below. VA P O Train A Train B MR S NT t