Question

a How
far apart were
the Card and the wall?​

Answer 1

Answer:

In the evening experiment,

m=  

o

1

​  

=  

1

−5

​  

⇒m=−5

m=  

u

v

​  

=∴v=−5u

Using m=  

v

1

​  

−  

u

1

​  

−  

f

1

​  

 , we get

m=  

−su

1

​  

−  

u

1

​  

−  

20

1

​  

⇒u=−12cm

As v=−5∗−12

v=60cm