Answer:
Ratio of length will be 
Explanation:
We have given time period of the pendulum when length is
is 
And when length is
time period 
We know that time period is given by

So
----eqn 1
And
-------eqn 2
Dividing eqn 2 by eqn 1

Squaring both side

Given:
F = 39 N, the force applied
t = 2 s, the time interval in which the force is applied.
By definition, the impulse is

Answer: 78 N-s
Wouldn't mass stay the same and acceleration increase or am I mistaken?
Answer:
dfsdfgsdfaefffsfffefefef
Explanation:
eg3g3gf3f3f3f3f3f3f3f3f3f3ggeg