Advertisements
Advertisements
Question
A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is,
Options
`"u"/"g"`
`"u"^2/(2"g")`
`"u"^2/"g"`
`"u"/(2"g")`
Advertisements
Solution
`"u"^2/(2"g")`
At highest point, v = 0
Using v2– u2 = 2as, we get
0 − u2 = 2(−g)h ( ∵ a = −g and s = h)
or h = `"u"^2/(2"g")`
APPEARS IN
RELATED QUESTIONS
What term is used to denote the change of velocity with time ?
What is meant by the term acceleration ? State the SI unit of acceleration.
Explain the meaning of the following equation of motion :v = u + at, where symbols have their usual meanings.
A bus was moving with a speed of 54 km/h. On applying brakes it stopped in 8 seconds. Calculate the acceleration.
Derive the formula s= `ut+1/2at^2` , where the symbols have usual meanings.
Which of the following could not be a unit of acceleration?
The slope of a speed-time graph gives:
Can you suggest a real-life example about the motion of a body from the following velocity – time graph?
A girl walks along a straight path to drop a letter in the letterbox and comes back to her initial position. Her displacement–time graph is shown in Fig.8.4. Plot a velocity-time graph for the same.
When will you say a body is at uniform acceleration?
