Question

A strong person and a weak person are trying to carry a ladder.How should they carry it in such a way that a weak person feels less weight of the ladder?

Answer 1

The strong person should carry the ladder at the  front end and the weak person should carry it at the back end.

Explanation:

• this is because in such a case the strong person has to pull the ladder whereas the weak person at the back end have to push the ladder. In such case it is easier to push because the weak person can use the force of gravity of his own body for pushing the ladder.
• However in case of pulling the ladder one has to overcome his own gravity to pull the heavy object

To know more,

Mention any three application of physics - Brainly.in

https://brainly.in/question/18697614

Answer 2

Answer:

Given P(1)=1,P(2)=2,P(3)=3,P(4)=5

Let f(x)=(P(x)−x)

f(1)=P(1)−1=1−1=0

f(2)=P(2)−2=2−2=0

f(3)=P(3)−3=3−3=0

∴f(x)=0,x=1,2,3

⇒f(x)=a(x−1)(x−2)(x−3)

P(x)=a(x−1)(x−2)(x−3)+x

Put x=4

5=a(3)(2)(1)+4

⇒a=

6

1

∴P(x)=

6

1

(x−1)(x−2)(x−3)+x

∴P(6)=

6

1

(5)(4)(3)+6=16