# Help on 2 Force questions (1 Viewer)

### Users Who Are Viewing This Thread (Users: 0, Guests: 1)

#### danield

Hey.. i am having problems solving the following question...

2) A 40-kg kangaroo exerts a constant force on the ground in the firs 60 cm of her jump, and rises 2.0 m higher. When she carries a baby kangaroo in her pouch, she cna rise only 1.8 m higher, What is the mass of the baby kangaroo?

I am not interested in the answer so much.. but in the logic of the problems.. i just cant do a free body diagram for them..
plz help
,dan

Last edited:

Homework Helper
Well, for (1), which forces are acting on the crate? Further on, what does the constant velocity tell you about the forces acting on the body?

#### danield

ok 1.. i could solve.. i used the equation of force applied+weight=force of friction, and i found force applied and the direction.
But im still having trouble wiht 2)

#### danield

Well ive been trying to do something like 2y/g=t^2, then V=y/t and then A=v/t, but i guess that is not working, i think ive been seeing it from the wrong angle, but any way i try i cant get the answer :(

### The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving