Question
Two cars A and B are running at velocities of 60km per
hour and 45 km per hour. What is the relative velocity of car A with respect to car B, if both are moving eastwards?Solution
Relative velocity is the vector difference between velocities of two bodies. If two bodies are moving in the same direction then relative velocity is given by their difference If two bodies are moving in the opposite direction we sum up their velocities. It means that one moving in the opposite direction is negative velocity and the other one is positive velocity. Positive and negative sign indicates the direction. Since, both are moving Eastwards A = +60 km /h B = +45 km / h Relative speed = 60 - 45 = 15 km / h
Give it a whirl
Select the most appropriate meaning of the given idiom.
To take pains
Don't try to blow smoke , I know the facts very well.
Charley Horse
Select the most appropriate meaning of the given idiom.
The trouble makers took to their heels when they saw the police coming.
...Select the most appropriate meaning of the bold idiom in the given sentence.
There was no one in the team who could bell the cat and tell the ...
In each of the following questions a statement has been given with highlighted idioms. You are required to choose the meaning of the idioms from the op...
To bring to the book
In the question below, a sentence is given with a part missing. From the options below, choose the correct combination of idioms that can fit in the bl...
A bolt from the blue