kinematics

Question 1

accelaration in nth second

Answer 1

u+a/2*(2n-1)

Question 2

eqn of trajectory

Answer 2

y=xtan@-g/2u^2cos^2@*x^2

Question 3

vertical height covered

Answer 3

u^2sin^2@/2g

Question 4

horizontal range

Answer 4

u^2(2sin@cos@)/g

Question 5

max range

Answer 5

45

Question 6

time of flight

Answer 6

2usin@/g

Question 7

relation b/w H RT

Answer 7

rtan@=4H=1/2 gt2

Question 8

contempory angles

Answer 8

R@=4√H@H90-@=1/2GT@T90-@`

Question 9

velocity at an instant of projectile

Answer 9

√(ucos@)^2+(usin@-gt)^2

inclined at an angle=tan β=usin@-gt/ucos@

Question 10

eqn of trajectory in horizontal

Answer 10

y=gx^2/2u^2

Question 11

time of flight in horizontal

Answer 11

t=√2h/√g

Question 12

horizontal range in horizontal projectile

Answer 12

R=u√2h/√g

Question 13

velocity of hoizontal projectile t NY TIME

Answer 13

V=√u^2+g^2t^2`

Question 14

speed

Answer 14

Speed is defined as the total path length (or actual distance
covered) by time taken by object
speed=distance/time taken

Question 15

average speed

Answer 15

total distance travelled/time

Question 16

velocity

Answer 16

Velocity is defined as ratio of displacement and
corresponding time interval taken by an object.
velocity=displacemet/time interval

Question 17

average velocity

Answer 17

total displacement/total time taken

Question 18

uniformly accelarated motion

Answer 18

v=u+at
s=ut+1/2 at^2
v^2=u^2+2as

Question 19

Equation of uniformaly accelerated motion under gravity are

Answer 19

v=u-gt
s=ut-1/2gt^2
v^2=u^2-2gh

Question 20

what is a projectile

Answer 20

Projectile is an object which
once projected in a given
direction with given velocity
and is then free to move
under gravity alone.

Question 21

Two trains A and B are running in the same direction on
parallel tracks such that A is faster than B. If packets of
equal weight are exchanged between the two, then

Answer 21

Initially, the momentum of the packet
in train A is more than in train B. When
packets are changed, the packetreaching train A being of lower momentum will retard the train A but
packet reaching train B, being of higher
momentum will accelerate B