In real life, objects never travel with uniform velocity even on a horizontal surface, unless something is done? Why is it so? What is to be done?

A block of mass M is pulled along a horizontal surface by applying a force at angle theta with the horizontal. The friction coefficient between the block and the surfasce is mu . If the block travels at a uniform velocity, find the work donen by this applied force during a displacement d of the blcok.

Why is the work done on an object moving with uniform circular motion zero?

Pravin has applied a force of 100 N on an object, at an angle of 60° to the horizontal. The object gets displaced in the horizontal direction and 400 J work is done. What is the displacement of the object?

Pravin has applied a force of 100 N on an object, at an angle of 60^@ to the horizontal. The object gets displaced in the horizontal direction and 400 J work is done. What is the disptacement of the object? (cos 60^@ =1/2)

An object is travelling in a horizontal circle with uniform speed. At t = 0, " the velocity is given by " vecu=20hati +35hatj km//s . After one minute the velocity becomes vecv= -20hati - 35hatj . What is the magnitude of the acceleration?

Question based on paragraph : A boy pushed his toy car on a table . The car moved ahead and stopped after travelling a certain distance . But when he kept on pushing his car , the car started moving with a uniform velocity . The boy later decided to do some adventurous activity while playing with his car , so he launched his toy car from a platform to a bucket filled with water as soon as the car landed inside the bucket , the water from the bucket splashed out and the boy enjoyed his new game .: Why did the toy car stop after travelling a certain distance ?

Question based on paragraph : A boy pushed his toy car on a table . The car moved ahead and stopped after travelling a certain distance . But when he kept on pushing his car , the car started moving with a uniform velocity . The boy later decided to do some adventurous activity while playing with his car , so he launched his toy car from a platform to a bucket filled with water as soon as the car landed inside the bucket , the water from the bucket splashed out and the boy enjoyed his new game .: What is the reason for splashing of water out from the bucket ?

Answer the following questions: In the following case, state whether work is done or not. Justify your answer: Activity: A body slides on a frictonless horizontal surface with a uniform velocity.

Complete the paragraph by choosing the appropriate words given in the brackets: (capability, Rehabilitation, commodities, Human, objectives, normalcy) The ............. of disaster management comprise of the following aspects. ............. life is saved from the disasters. People are helped to move away from the place of disasters. They are given essential ............ by the government so that the gravity of disaster is reduced. The disaster conditions are brought back to ............. . ............... Of the affected and displaced victims is done. Moreover, protective measures for future are also planned to develop ............... among the people to face any possible disasters in future.

Answer the following questions: State the condition under which the work done is (i) positive (ii) negative(iii) zero. Why is the work done on an object moving with uniform circular motion zero?