class 09th science motion test 02 answer

8/19/2019 Class 09th Science Motion Test 02 Answer

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01. ( )

02. ( )

03. ( )

04. ( )

05. ; 1 = = 21 = = 40 /1 = =speed time×

1 = 40 × 2 = 80 , 2 = = 3

2 = = 60 /2 = =speed time×

2 = 60 × 3 = 180 = 1 + 2 = 80 + 180 = 260

, 1 + 2 = 2+3 = 5

=tan 260

= 52km/hr 5

total dis cetotal time

=

06. ( ) .( ) .

07. = 0, = , =

= , = ×

=2

initial velocity final velocity+

=2

Vo V +

= =2

Vo V t

+×




2

2

2

1320 0 10

2320 2

10

64

8sec

t t

t

t

t

= × + × ×

×=

=

=

( ) from v u at = + 0 10 8

80 /

v

v m s

= + ×

=

10. ;

2

(i)

1 (ii)

2

v u at

s ut at

= +

= +

, = = = = =

( ) =v ua

−

( )

2 2 2

2

2 2 2

2 2 2

1

2

1 2

2

1 2

2

2 2 22

v u v us u a

a auv u v u uv

s aa a

uv v v u vus

a a

uv u v u vusa

− −= × + ×

− + −= + ×

− + −= + ×

− + + −=

2 2

2 2

2 2

2

2

2

v us

aas v u

v u as

−=

= −

= +




11. ( ) :, = = = +

=1

2base height × ×

=1

6 102

× ×

= 30 = ×

= (16 6) × 10=10 × 10= 100

= 180 =180

( ) = 11 , , = .

12. = = 60 / = = 0 / ( )

( ) = = 10 /2 2 2

2 2

2

36000 (60) 2 ( 10) 902 ( 10)

v u gh

h h h m

− =

−

− = × − × ⇒ = ⇒ =− × −

( ) = + = 60 12 × 60 10 6sect t ⇒ = × ⇒ =

13. ( )

. . . . . . . .

.

( ) =2 1

2 1

y y x x

−

−

(36 24) 126 / sec

(6 4) sec 2sec

m mm

−= = =

−

( ) = = 6 /

class 09th science motion test 02 answer

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