Question
A body moves with uniform acceleration and covers 80 m
in 4 s and 160 m in next 4 s. Find initial velocity.Solution
We know the body moves with uniform acceleration, and the distance covered in two time intervals is given: Distance covered in the first 4 seconds = 80 m Distance covered in the next 4 seconds = 160 m Let the initial velocity be u u and the acceleration be a Using the equation for uniformly accelerated motion: 
For the first 4 seconds (time = 4 s, distance = 80 m): 80=4u+8a(Equation 1) For the next 4 seconds (time = 8 s, distance = 160 m): The distance covered from 4 to 8 seconds can be written as: 
This simplifies to: 80=4u+8a(Equation 2) Now, comparing Equation 1 and Equation 2, we see that both are identical: 4u + 8a = 80 Therefore, u=20m/s
Select the most appropriate word for the given group of words.
A traveller who moves from one region or country to another
Select the most appropriate option to substitute the bold segment in the given sentence.
Our guests arrived ; they are sitting in the garden.
The mandate of higher education is to nurture critical thinking that entail questioning; that includes a multiplicity of thoughts; and, most impo...
Select the most appropriate word segment for the bold word in the given sentence.
Pintu has been advised to reduce smoking by his family doctor...
Relentless
Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No substi...
Select the option to complete the sentence most logically and appropriately.
He didn't see the whole film because
Select the most appropriate meaning of the given idiom.
A hard nut to crack
The finance ministry has consistently maintained that such information was confidential and …………..only be used to levy punitive taxes,if the cha...
Select the most appropriate option to improve the bold segment in the given sentence. If there is no need to improvement it,select, no improvement.
...
Relevant for Exams:
