Please answer questions

Problem 1. Two blocks tied together by a horizontal string are being pulled across the table by a horizontal force of 30 N as shown in Fig.1. The 2kg block has a 6N frictional force exerted on it by the table. and the 2 kg block has an 8N frictional force acting on it. (a) What is the net force acting 011 the entire two-block system? (b) What is the acceleration of this system? (c). 'Nhat force is exerted on the 2 by block by the connecting string? (Consider only the forces acting on this block. Its acceleration is the same as that of the entire system.) (d) Find the net force acting on the 4 kg block and calculate its acceleration. How does this value compare to that found in part (b)? 2kg 4kg .H: -:\""N EN EN Figure 1: Schematic graph for Problem 1. Problem 2. A car with a mass of m = 750 by is traveling around a curve with a radius of R = 250 m at a constant speed of V = 36-mife/hour. (a) 1What is the magnitude of the centripetal acceleration of the car? (b) What is the magnitude of the centripetal force required to produce this acceleration? Problem 3. The sun's mass is ME. = 1.99 103\" leg, the Earth's mass is it-lat = 5.98 102'1 kg, and the moon's mass is le = 7.36 - 10'22 kg. The average distance between the moon and the Earth is Dug = 3.82 . 108 m, and the average distance between the Earth and the sun is D55,- 2 1.50 - 1011 m. (it) Using Newton's law of gravitation, nd the average force exerted on the Earth by the sun. (b) Find the average force exerted on the Earth by the moon. (c) What is the ratio of the force exerted on the Earth by the sun to that exerted by the moon? Will the moon have much of an impact on the Earth's orbit about the sun? (d) Using the distance between the Earth and the sun as the average distance between the moon and the sun. nd the average force exerted 011 the moon by the sun