tag:blogger.com,1999:blog-5829543094277891812024-03-05T21:12:42.395-08:00Nawendu Numerical Classesnavin kumar nawenduhttp://www.blogger.com/profile/13189155960662844611noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-582954309427789181.post-26425868009521126082019-08-08T10:04:00.001-07:002019-08-08T10:07:27.202-07:00Motion in a Straight Line<p dir="ltr"><i>These </i>Motion in a Straight Line<i>  Numericals are very useful for the students  preparing for school as well as competitive examinations.Video solution  with answer for each question for chapter  Motion in a Straight Line Numerical  of 11th physics is given.</i><br></p>
<p dir="ltr">Q1) A Body starts from rest and travels 120cm in the 8th second. then <br>
acceleration of the body is <br>
body is..[AFMC 1997]<br>
ANS. 0.16m/se<br>
Q2) A car travels first half distance between to places with a speed of 30km/hr <br>
and the remaining half with a speed of 50km/hr. the average speed of the car <br>
is <br>
Ans. 37.5km/hr<br>
Q3) The displacement x of a particle moving along a straight line at time t is <br>
given by <br>
x=a0+a1t+a2t<br>
2<br>
The acceleration of the particle is <br>
Ans. 2a2<br>
Q4) Find the total displacement of a body in 8 seconds starting from rest with <br>
an acceleration of 20cm/sec2[AFMC 2000]<br>
Ans.640cm <br>
Q5) A particle moves along a straight line OX. At a time (in second) the distance <br>
x (in meters) of the particle from O is given by <br>
x=40+12t-t3<br>
How long would the particle travel before coming to rest (AFMC2000)<br>
Ans. 40m<br>
Q6) A bus start from rest with an acceleration of 1 meter/sec2<br>
. A man who is 48 <br>
meter behind the bus with a uniform velocity of 10m/sec then the minimum <br>
time after which the man will catch the bus is (AFMC 2001)<br>
Ans. 8sec<br>
Q7) The displacement of a particle moving in straight line depends on time as <br>
x=αt+βt<br>
2+yt+ᶑ the ratio of initial acceleration to its initial velocity depends <br>
[AFMC 2002]<br>
Ans. Only on β and y<br>
Q8) A particle covers 150 meter in 8th second starting from rest , its <br>
acceleration is [AFMC 2003]<br>
Ans. 20 meter/sec2<br>
Q9) A car is moving with uniform acceleration it covers 200 meter in 2 second <br>
and 220 meter in next 4 second . The velocity of car at the end of end of 7th <br>
second from start is <br>
Ans. 10 m/s<br>
Q10) A train of 150 meter long is going towards north direction at speed of 10 <br>
meter/second . A parrot flies at the speed of 5meter/second towards south <br>
direction parallel to the railway track . The time taken by the parrot to cross <br>
the train is [CBSE-PMT 1992] <br>
Ans. 10 second<br>
Q11) A bus travelling the first one third distance at the speed of 10km/s , the <br>
next ne third at 20km/s and the last one third at 60km/s , the average speed of <br>
the bus is …… [CBSE-PMT 1991] <br>
Ans. 18km/s<br>
Q12) A car accelerates from rest at a constant rate α for some time, after which it decelerated at constant rate β and comes to rest. If the total time<br>
elapsed is t, then the maximum velocity acquired by the car is.. <br>
[CBSE PMT 1994 ]<br>
Ans. αβt/α+β<br>
Q13) A particle moves along a straight line such that its displac<br>
time ‘t’ is given by<br>
s t3-6t2+3t+4) meters<br>
The velocity when the acceleration es zero is… [CBSE PMT 1994]<br>
Ans.<br>
Q14) A particle covers half of its total distance with speed v1 and the rest<br>
half distance with speed v2. Its average speed during the complete journey<br>
is..[CBSE-PMT 2O11]<br>
Ans. 2v1v2/v1+v2<br>
Q15) A ball is dropped form a high rise platform at t=O starting from rest.<br>
After 6 seconds another ball is thrown downwards from the same platform<br>
with a speed y. The two balls meet at t=1 8s. What is the value of y?<br>
[g=1Om/s2) [CBSE-PMT 2011]<br>
Ans. 75m/sec<br>
Q16) A particle moving in a straight line with a constant acceleration changes its velocity from 10 m/s to 20m/s, while passing through<br>
135 m in t second. The value of t is ... [CBSE-PMT 2008]<br>
Ans. 9<br>
Q17) A particle starts its motion from rest under the action of<br>
force. if the distance covered in first 10 second is S1 and<br>
first 20 seconds is S2 then .. [CBSE-PMT 20091]<br>
Ans. S2 = 4S1<br>
Q18) If a ball is thrown vertically upwards with speed of ‘u’ the distance<br>
covered during the last ‘t’ second of its ascent is.. [CBSE-PMT 2003]<br>
Ans. ½ gt2<br>
Q19) A bus is moving with a speed of 10meter/second on a straight road . A <br>
scooterist wishes to over take the bus in 100second. If the bus is at a distance <br>
of 1km from the scooterist , with what speed should the scooterist chase the <br>
bus ? [CBSE-PMT 2009]<br>
Ans. 20 m/s</p>
navin kumar nawenduhttp://www.blogger.com/profile/13189155960662844611noreply@blogger.com0