The diagram below shows three forces P, Q, and R in equilibrium. P acts horizontally and Q acts vertically. When P = 5.0 N and Q = 3.0 N, calculate the magnitude and direction of R. An object of weight 50 N is suspended vertically by two strings as shown below. The strings are of the same length and the angle between them is 60°. Draw a free body diagram of the forces acting on the object and calculate the tension in the strings. The diagram below shows two blocks connected by a string that passes over a pulley. Block A has a mass of 2.0 kg and block B a mass of 4.0 kg and rests on a smooth table. Determine the acceleration of the two blocks. A girl throws a stone vertically upwards. The stone leaves her hand with a speed of 15.0 m/s. Determine the maximum height reached by the stone and how long it takes to return to the ground after leaving her hand. Note: The acceleration due to gravity is equal to -9.8 m/s². As shown below, a railway truck of mass 6000 kg collides with a stationary truck of mass 3000 kg. The first truck moves with an initial speed of 2.5 m/s and the second truck moves off with a speed of 1.9 m/s in the same direction.