Q)
(chatquestion)...A thief crosses a check point with a constant high
speed at time t = 0. After waiting for certain time
interval police car starts chasing thief with
constant acceleration and catches the thief:
Graph (1)
Graph (2),
(1) Graph (1) represents displacement vs tima
graph for police car.
(2) Graph (2) represents displacement vs time
graph for thief.
(3) Displacement of police car and thief are pe
equal from check point.
(4) Average velocity of police car and thief is pot
equal in time interval t=t, to T till thief is caught.
28,
Velocity of a particle varies with time a.
v =t² -t-2. Average speed of the particle in time
interval from t = 0 to t = 4 sec is :
4
(1)
m/s (2) 2 m/s (3)3 m/s
(4) 5 m/s
3
Paragraph for question nos. 29 and 30
The next TWO questions will refer to the
following situation. A car starts from rest and
accelerates as shown in the accompanying
diagram.
a
4-...(27 send soln)
1 Answer
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