Question

Physics class 9 motion numerical
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Answer 1

Question 1

A train accelerates from 36 km/h to 54 km/h in 10 sec.

(i) Acceleration

(ii) The distance travelled by car.

Answer a. Acceleration is given by

a

=

Δ

v

Δ

t

Δ

v

=

54

−

36

=

18

k

m

/

h

r

=

5

m

/

s

So a=.5 m/s2

b. Distance is given by

S

=

u

t

+

1

2

a

t

2

So s=125m

Answer 2

HOPE IT HELS YOU BRO....