A car is moving with a uniform acceleration on a straight road .Find the acceleration of the car and its distance traveled in 50 seconds ,if the speed if 5[m/s] and the time is 0 seconds

Remember the definotion of acceleration: change in velocity divided by time. As for distance traveled, there is a formula that you need to memorize and practice using:

x = x_0 + v_0 t + \frac 1 2 a t^2

where x_0 is initial displacement at t=0 and v_0 is initial velocity at t=0. Try it - what do you get for an answer?