physic quuestion

QUESTION 1 (a) A car travels on a simple curve highway as shown in Figure Q1(a) having a radius of r = 3000 m such that at point A the car speed is 95 m/s. The driver is then applies brakes casuing a constant deceleration rate. The speed of the car has been reduced to 70 m/s after 8 sec. Determine: VA = 95 m/s 3000 m Figure Q1(a): Car travels on highway. (i) The tangential component of acceleration. [3 marks] (ii) The normal component of acceleration. [3 marks] (iii) The acceleration magnitude of the car immediately after the brakes are applied. [4 marks] (iv) The direction of acceleration with respect to tangent to curve. [3 marks] (v) Sketch all the acceleration direction of the car. [3 marks] -12- (b) A truck carries a load moves with a speed of 85 km/h as in Figure Q1(b). The coefficient of friction between the load and the flat-bed truck is As = 0.25. With the aid of free body diagram, calculate the shortest distance in which the truck can be brought to stop if the load is not to shift. O Figure Q1(b): Truck with load. [9 marks]