Question

A stone from a height of 90cm above the top of 160cm high. The time taken by the stone to cross the window

Answer 1

Explanation:

S=ut

2

1

gt

2

u=0

10cm=

2

1

×10×t

2

100

10

=

2

1

×10×t

2

t

2

=

100

2

t=

10

2

=

=

10

1.414

=0.14=

4

1

s

=

100

90

100

90

=

2

1

×10×t

2

100

18

=t

2

t=

10

4.25

=0.425=

4

3

=t

2

−t

1

=

7

3

−

7

1

=

7

2

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