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Class 11
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Physics
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Motion in a Straight Line
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Uniformly Accelerated Motion
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Velocity - Time Relation in Uniform Acce...
Velocity - Time Relation in Uniform Acceleration Motion
7 Mins
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Important Questions
A ball is thrown vertically upwards with a velocity of
$20ms_{−1}$
from the top of a multi storey building.The height of the point where the ball is thrown 25 m from the ground.How long will it be before the ball hits the ground ? Take
$g=10ms_{−2}$
.
Medium
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>
A ball is dropped from a high rise platform at
$t=0$
starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed
$v$
. The two balls meet at
$t=18s$
. What is the value of
$v$
? (Take
$g=10m/s_{2}$
)
Medium
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>
A particle experiences constant acceleration for
$20$
seconds after starting from rest. If it travels a distance
$s_{1}$
in the first
$10$
seconds and distance
$s_{2}$
in the next 10 seconds, then
Medium
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>
A particle moves in a straight line with a constant acceleration. It changes its velocity from
$10ms_{−1}to20ms_{−1}$
while passing through a distance
$135m$
in
$t$
second. The value of t is
Medium
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>
If a car at rest accelerates uniformly to a speed of 144 km
$h_{−1}$
in 20 s, then it covers a distance of:
Medium
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>
A particle starts from the origin at t = 0 s with a velocity of 10.0
$j^ $
m/s and moves in the x-y plane with a constant acceleration of
$(8.0i^+2.0j^ )$
m/
$s_{2}$
.
(a) At what time is the x- coordinate of the particle 16 m? What is the y-coordinate of the particle at that time?
(b)What is the speed of the particle at the time ?
Medium
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>
A body
$A$
starts from rest with an acceleration
$a_{1}$
. After
$2$
seconds, another body
$B$
starts from rest with an acceleration
$a_{2}$
. If they travel equal distances in the
$5_{th}$
second, after the start of
$A$
, then the ratio
$a_{1}$
:
$a_{2}$
is equal to
Medium
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>
A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m.If the ball is in contact with the floor for 0.01 sec, then average acceleration during contact is
Medium
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>
A particle starts from rest, accelerates at
$2ms_{−2}$
for
$10s$
and then goes for constant speed for
$30s$
and then deceleration at
$4ms_{−2}$
till stops after next. What is the distance travelled by it?
Hard
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>
A car accelerates from rest at constant rate of
$2m/s_{2}$
for some time. Then its retards at a constant rate of
$4m/s_{2}$
and comes to rest. if it remains in motion for
$3$
seconds, then the maximum speed attained by the car is:-
Medium
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>