Can someone tell me the answer and the reason

frictional force Ff is less than applied force.

Explanation:

the case belongs to equilibrium, acc to that if the sum of forces acting on a body is zero than the body is said to be in a state of equilibrium.

Since force of gravity is balanced by normal reaction and if applied force increased to the frictional force then the body will start moving in the direction of force.

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.