Question

1.) A block of mass 0.40 kg is attached to the wire connected to the wall making an angle of 90 degrees with it. It is also attached to the ceiling with the wire making an angle of 53 degrees with the horizontal. Calculate tensions at each wire. (s the tension in the wire hinged to the ??wall and is the tension in the wire attached to the ceiling).

2.) A 5.0 kg wood block is on ice being pulled by two equal forces of 20 Newtons applied at the same point. The angle between the forces is 120 degrees. Find the acceleration of the block, neglect friction.

3.) A 60 kg person is in an elevator:a) Calculate the apparent weight of the person when an elevator is going down with acceleration of 3.0 m/s2.b) What is an apparent weight of the person when an elevator is going up with an acceleration of 3.0 m/s2.

4.) Two masses m1= 0.30 kg and m2 = 0.40 kg are connected by a light string that passes over the frictionless and massless pulley. a) What is the total mass that accelerates?b) Find the net force on the system that causes the acceleration?c) Using Newton’s second law find the acceleration of each block?

5.) Using Newton’s Laws of Motion for the system shown to the right, the coefficient of friction between m1 and the surface is 0.20, m1 = 1.5 kg, m2 = 5.0kg, and θ = 40 °. a) Clearly indicate all the forces acting on each mass. b) Determine the acceleration of each mass, and c) The tension in the cord.

6.) A block of weight 500.0 N is suspended by two cables as shown below. Determine the tensions in the strings in the block is in equilibrium. (Given: θ1 = 25.0 and θ2 = 35.0)

Answer 1