A vehicle with a mass of 1000 kg is moving with a constant speed of 5 m/s on a concave bridge. The curvature radius of the bridge is 20 m. What is the magnitude of the force that the vehicle exerts on the bridge, if the line connecting center of curvature of the bridge with the vehicle makes a θ = 60º with the vertical direction. Assume g = 10 m/s2.