The figure shows a train traveling at a constant uniform velocity of 75 kph and a car travelling at a speed of 36 kph towards point O. Which of the following gives the nearest value of the velocity of the car at the collission point? -1 km- 36 kph I km train

I need help on parts a and b

At the instant shown in (Figure 1) , the car at A is traveling at 10 m/sm/s around the curve while increasing its speed at 5.1 m/s2m/s2. The car at B is traveling at 28.5 m/sm/s along the straightaway and increasing its speed at 2 m/s^2.   First Question: Determine the direction angle of the relative velocity with respect to B at this instant, measured counterclockwise from the positive x axis. Second Question: Determine the magnitude of the relative acceleration of A with respect to B at this instant. Third Question: Determine the direction angle of the relative acceleration with respect to B at this instant, measured counterclockwise from the positive x axis.

Figure Q1(b) shows a train travelling along a circular curve of a radius r = 300 m. Atthe instant shown, its angular rate of rotation is 0.03 rad/s which is decreasing at0.0015 rad/s2. Calculate the magnitude of train’s velocity at this instant shown andalso calculate the magnitude and direction of the train’s acceleration at this instant.