Connected Motion

What is net force acting on the system:

• mg

• R

• R-mg

• 0

Consider three masses of 1kg, 3kg and 6kg which are connected to each other and are placed horizontally on the table. Calculate the acceleration of this system. Consider g = 10m/s²

• 3

• 0

• 1

• 2

When particle is in equilibirium, the sum of forces acting on it equals

• constant

• greater than 0

• less than zero

• 0

For a frictionless pulley and cable, tensions in the cable(T1 and T2) are related as

• T1=T2

• T1>T2

• T1<T2

• cannot be defined

Two masses of 6kg and 4kg are connected to the two ends of a light inextensible string that goes over a frictionless pulley. What is the acceleration of the masses?

• 3m/s²

• 2m/s²

• 1m/s²

• 4m/s²

Two masses 30kg and 50kg are connected by a massless string . Find the value of tension in the string if a force of 200N is applied on 30kg.

• 125N

• 0N

• 75N

• 200N

A body is at rest on the surface of the earth. Which of the following statements is correct

• No force is acting on the body

• Only weight of the body acts on it

• Net downward force is equal to the net upward force

• None of the above

If a body is in eqilibirium under a set of non-collinear forces, then the minimum number of forces has to be

• 4

• 2

• 5

• 3

Horse is pulling a cart. The force which is responsible for the motion of horse in forward direction:

• Ground on the cart

• Ground on the horse

• cart on the horse

• cart on the ground

A pull of 15N is applied to a rope attatched to a block of mass 7kg lying on a smooth horizontal surface. The mass of the rope is 0.5kg. What is the force exerted by block on the rope?

• 7N

• 14N

• 15N

• 2N