Two straight lines drawn on the same displacement-time graph make anles `30^(@)` and`60^(@)` with time-axis respectiv ely Fig. 2 (a) .36, Which line repersents greater veloc ity ? What is the ratio of two velocities? .

Two straight lines drawn on the same displacement-time graph make anle

1.	Two straight lines drawn on the same displacement-time graph make anles `30^(@)` and`60^(@)` with time-axis respectiv ely Fig. 2 (a) .36, Which line repersents greater veloc ity ? What is the ratio of two velocities? .
Answer» Since the slpe of the displacement-time graph of uniform motion in one dimension represents the velocity of the object, hence the line showing grearer slope in graph corresponds to greater velocity of the object. Therfore the line making angle `60^(@)` with time axis represents greater velocity: Ratio of two velocities , `= v_(A)/v_(B) = (tan 30^(@))/(tan 60^(@)) = (1 //sqrt 3)/(sqrt3 ) = 1/2`/

Discussion

No Comment Found

Related InterviewSolutions

From the top of at all building (height27.3m), a boy throws an apple upward, which strikes ground after 16 s. Take `g = 9.8 m//s^(2)`, find the speed of apple with which it was thrown and the maxium height reached by it.
A car travels along a straight line for first half time with speed `40 km//h` and the second half time with speed `60 km//h`. Find the average speed of the car.
A vechicle travels along a straight path between two places `alpha and beta`. It travels first half of the distance with a velocity of 72 km `h^(-1)` and the remaining distance with a velocity of 36 km `h^(-1)` then the average velocity of the vehicle is ______ m`s^(-1)` A. 11.3B. 13.3C. 15D. 14
In the case of a simple pendulum, a graph is drawn between the displacement and time taken for its oscillations as shown in the figure . Then From the given figure, the number of oscillation performed by the bob at the end of 21 s is ________ A. 3B. 4C. 2D. `3^(1//2)`
`{:("ColumnA","ColumnB"),(A. "Periodic motion",a."maximum displacement of vibrating particle from its mean position"),(B."Vibrtory motion" ,b."The pistion of a motor car engine at uniform car engine at uniform speed"),(C."Body at rest" ,c."Non- uniform motion"),(D."Amplitude",d.18//5 kmh^(-1)),(E."Variable speed" ,e."OScillating objects undergo change in shape of size"),(F. 1ms^(-1) , f. ("Total displacement")/("Total time")),(G."Average velocity" ,g. "Zero velocity"):}`
`{:( "Column A"," ColumnB"),(A. "Non- uniform motion","a. To measure speed of the vehicle"),(B."Oscillatory motion","b. Uniform motion"),(C."Mean position" , "c. A criket ball that rolls over ground"),(D."Speedometer","d.The needle of sewing machine that moves up and down"),(E."Constant speed","e. Freely suspended pendulum at rest"),(F. "Acceleration","f".("Total change in velocity")/("Total time taken for change")):}`
`{:( "Column A"," ColumnB"),(A."Speed",a."Uniform motion"),(B."Time",b."Non-uniform motion"),(C."Average speed",c."km h"^(-1)),(D."Uniform speed in a straight line",d."second"),("E. Freely falling body","e. Change in time period"),("F. Change in length of a pendulum","f".("Total distance")/("Total time")):}`
`{:("Column A" ,"ColumnB"),((A)"A body covers 5 m in every subsequent second",(a)"Lunar month"),((B)"Equal distances in unequal intervals of time",(b)"Non-uniform speed"),((C) "Periodic motion of the moon around the earth",(c)"Years"),((D)"Approprite unit to express the age of a person",(d) "Constant speed"):}`A. `A to b, B to c, C to d,D to a `B. `A to d, B to b, C to a, D to c`C. `A to d, B to a, C to b, D to c`D. ` A to a, B to b, C to c, D to d`
A ball thrown by one player reaches the other in `2 s`. The maximum height attained by the ball above the point of projection will be about.A. 2.5 mB. 5 mC. 7.5 mD. 10 m
A thief in a stolen car passes through a police check post at his top speed of `90 kmh^-1.` A motorcycle cop, reacting after 2 s, accelerates from rest at `5 ms^-2.` His top speed being `108 kmh^-1.` Find the maximum separation between policemen and thief.A. `112.5 m`B. `115 m` (c) 116.5 m (1) None of theseC. `116.5 m`D. None of these

Two straight lines drawn on the same displacement-time graph make anles `30^(@)` and`60^(@)` with time-axis respectiv ely Fig. 2 (a) .36, Which line repersents greater veloc ity ? What is the ratio of two velocities? .

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment