Friday

April 18, 2014

April 18, 2014

Posted by **Chris** on Thursday, December 14, 2006 at 4:22pm.

I know that KE=1 for the son and he has 1/2mass. The father has 1/2 KE and 1 mass. Should I use v^2=V_i^2 +2ad?

How would I do this?

Let V be the initial velocity of the son, and M be his mass The father's initial speed must be V/2, so that

(KE)son = (1/2) M V^2

(KE)father = (1/2)*(2M)*(V/2)^2

= (1/2)(KE)son

You also know that

(1/2)(2M)[(V/2) +1]^2= (1/2) M V^2

2M [(V/2) +1]^2 = MV^2

2[(V/2) +1]^2 = V^2

This will lead to a quadratic equation for V. Solve for V, and then V/2, the father's initial speed.

**Related Questions**

physics - A father racing his son has 1/3 the kinetic energy of the son, who has...

physics - A father racing his son has 1/3 the kinetic energy of the son, who has...

Physics - A father racing his son has one-third the kinetic energy of the son, ...

Physics Concepts - A father racing his son has one-third the kinetic energy of ...

logic - A son and his father take a daily walk up a hill. It is 1.5 km to the ...

NEED HELP...how do i draw a visual for this ques? - A son and his father take a...

math - In the Malagasay Indian tribes, it is against the law for a son to be ...

College Math - A certain man spent 10% of his life in childhood and 20% of his ...

Can someone edit my paragraph? - A young man prepares to graduate from college. ...

Lit - In "Follower" the person who follows is. both father and son. but in the ...