Answer:
![\theta = 76.9 degree](https://tex.z-dn.net/?f=%5Ctheta%20%3D%2076.9%20degree)
Explanation:
As we know that the resultant of two vectors is given as
![R = \sqrt{F_1^2 + F_2^2 + 2F_1 F_2 cos\theta](https://tex.z-dn.net/?f=R%20%3D%20%5Csqrt%7BF_1%5E2%20%2B%20F_2%5E2%20%2B%202F_1%20F_2%20cos%5Ctheta)
here we know that
![R = 87 Lb](https://tex.z-dn.net/?f=R%20%3D%2087%20Lb)
![F_1 = 41 Lb](https://tex.z-dn.net/?f=F_1%20%3D%2041%20Lb)
![F_2 = 68 Lb](https://tex.z-dn.net/?f=F_2%20%3D%2068%20Lb)
now we have
![87 = \sqrt{41^2 + 68^2 + 2(41)(68)cos\theta](https://tex.z-dn.net/?f=87%20%3D%20%5Csqrt%7B41%5E2%20%2B%2068%5E2%20%2B%202%2841%29%2868%29cos%5Ctheta)
![87^2 = 6305 + 5576 cos\theta](https://tex.z-dn.net/?f=87%5E2%20%3D%206305%20%2B%205576%20cos%5Ctheta)
![\theta = 76.9 degree](https://tex.z-dn.net/?f=%5Ctheta%20%3D%2076.9%20degree)
If you divide 68.5 km/h by 60 (the minutes in an hour) and then you get 1.141 then you multiply it by 5.45 and you get 6.222!
Your Answer is 6.222!!!!
Answer:
Elastic Collision
Inelastic Collision
The total kinetic energy is conserved. The total kinetic energy of the bodies at the beginning and the end of the collision is different.
Momentum does not change. Momentum changes.
No conversion of energy takes place. Kinetic energy is changed into other energy such as sound or heat energy.
Highly unlikely in the real world as there is almost always a change in energy. This is the normal form of collision in the real world.
An example of this can be swinging balls or a spacecraft flying near a planet but not getting affected by its gravity in the end.
I believe the answer is the mass of the object and the speed at which it is moving.