Physics 2 question

7/24/2019 Physics 2 question

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Q1.The Figure below shows the acceleration versus time graph of a particlemoving along an axis. In which of the time intervalsindicated in the gure,does the particle move at constant speed? Explain.

Q2.A car starts from point A, goes !! "m in a straight line to point B,

immediatel# turns around, and returnsto point A. The time for this round trip

is $ hrs. %hat is the magnitudeof the average velocityof the car for this

round trip?

Q3.A particle starts from rest at t & ! s. Its acceleration as a function of time asshown in the gure.

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%hat is its speedat the end of the (.! s? Ans: ).! m*s

Q4.The position of a particle as a function of time is described b# the e+uationx(t) = 2.0 + 3.0 t t3, wherexis in m andtis in s. %hat is the maximumpositive positionof the particle on the x axis?Ans: ).! m

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Q5.Two automobiles,-! "ilometers apart, are traveling toward each other. neautomobile is moving at (!"m*h and the other is moving at )! "m*h. In howmany hourswill the# meet? Ans: .-

Q.Two cars A and B travel on a straight line. The position of car Ais given bxA(t) =2.60 t + 1.20 t2, where tis in seconds andxAin m. The position of car Bis

given b#xB(t) =2.80 t20.20 t3. At what timethe two cars will have the same

acceleration? Ans: $.(/ s

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1

h

Q!.A roc" is thrown verticall# upward from ground level at time t & !. At time t& .- s it passes the top of a building of height 1, and .! s later it reached itsmaximum height. %hat is the height1 of the building? Ans $( m

Q".b2ect is thrown verticallyupwards and has a speed of 3 m*s when it

reaches one#$ourthof its maximum height habove its launch point. 4abel the

relevant points and answer the following5

a% 6etermine the maximumheight h.

&%%hat is the initial speed of throwing the ob2ect?

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1'' m

(

Q).A stone is thrown vertically upfrom the edge of the top of a !! m highbuilding. It reaches the ground 7at the bottom of the building8 after !.! s. %hatis the initial speedof the stone?Ans: 09.! m*s

Q1'.A stone is thrown verticall# downwardfrom a building with an initial

speedof $.! m*s. It reaches the ground after -.! s. %hat is the heightof thebuilding and at what timethe stone reaches a height of $! m above the ground?4abel the relevant points.

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0

5

10

5

10

time (s)

0 5 10 15 20 25 30

A

B

C

Dposition

(m)

1' 15 25

v*m+s%

t *s%5 2' 3''

Q11.The position of a particle in meters is given b#, x(t)=16 t3.0 t3

where the

time t is in seconds. At what timeis the particle momentaril# at rest? Ans:.0 s

Q12.An ob2ect is moving along the x axis. The graph shows its position from thestarting point as a function of time. :arious segments of the graph are identiedb# the letters A, ;,

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Physics 2 question