Posted by **slien** on Thursday, October 12, 2006 at 12:15am.

Imagine a motorcycle rider moving with a speed 0.7c past a stationary observer. If the rider tosses a ball in the forward direction with a speed of 0.6c, relative to himself, what is the speed of the ball as seen by the stationary observer? Ans in units of c.

The addition of velocities formula says

(u+v)/(1+uv/c^2)

You can do it all in units of c, so plug in u=0.7 and v=0.6 to get approximately 0.92.

## Answer This Question

## Related Questions

- physics - A person riding in the back of a pickup truck traveling at 60km/h on a...
- Physics - This is a 2 part question, and I'm fine on part 1. However, for ...
- Algebra - A motorcycle breaks down and the rider has to walk the rest of the way...
- physics - A motorcycle and 66.0 kg rider accelerate at 2.0 m/s2 up a ramp ...
- physics - A motorcycle and 66.0 kg rider accelerate at 2.0 m/s2 up a ramp ...
- college physics - A popular daredevil trick is to complete a vertical loop on a ...
- angular momentum - Just after a motorcycle rides off the end of a ramp and ...
- physics - motorcycle and 66.0 kg rider accelerate at 2.0 m/s2 up a ramp ...
- physics - A motorcycle stunt rider must jump a 100m wide canyon given a 20° ramp...
- physics - A special electronic sensor is embedded in the seat of a car that ...

More Related Questions