The stone is now on an inclined plane at an angle θ to the horizontal where it is momentarily stationary.
(c)
Label the diagram to show the forces acting on the stone that act parallel and perpendicular to the plane. Your answer should include the name, the direction and point of application of each force.
Ric realises that he forgot his lab coat on the floor below. He again travels in the elevator which goes downwards at the same speed, coming to rest in the same time.
(b)
Calculate the reaction force on Ric from the elevator floor during the time it takes to come to rest at the floor below.
Block A is now placed on top of block B. The coefficient of static friction between the two blocks is 0.31. The bottom block is pulled with a horizontal force F.
A gardening enthusiast wants to hang a flower pot from two strings on the ceiling of their balcony. They have two pieces of string, but they are unfortunately quite old and frayed.
(d)
Suggest and explain how they can attach the strings to the flower pot in order for them to stay intact.
Question 5a
Marks: 2
A stone block is pulled at constant speed up an incline by a cable attached to an electric motor.
The incline makes an angle of 17º with the horizontal. The mass of the block is 180 kg and the tension T in the cable of 0.9 kN.
(a)
On the diagram draw and label arrows that represent the forces acting on the block.
