# Forces on high velocity object

1. Nov 28, 2014

### johann1301

Imagine a sequence where an object with mass M1 is traveling V=V1=10m/s straight through empty space relative to reference frame P. Since V1 << C, we can ignore relativistic effects. This implies that any force that may be applied too the object would be given by the Newtonian formula F=M1A. This is true in all possible directions the force F may be applied.

Now, i want to concentrate on 3 different directions the force may be applied when V=V2≈C. I wish too know what the formulas for the forces are when the force is applied;

(i) perpendicular too V2
(ii) in the same direction as V2
(iii) in the opposite direction as V2

Important: The force is in all three cases applied from reference frame P.

Last edited: Nov 28, 2014
2. Nov 28, 2014

### Staff: Mentor

3. Nov 28, 2014

### johann1301

(i) perpendicular too V2
F=MγA

(ii) in the same direction as V2
F=Mγ3A

(iii) in the opposite direction as V2
F=-Mγ3A

(where γ is the Lorentz factor)

Last edited: Nov 28, 2014
4. Nov 28, 2014

### Staff: Mentor

That's it!

5. Nov 28, 2014

Thank you!