A string with a mass was attached to roof of a bus travelling at a constant velocity.
The bus then enters a round about, without changing it’s speed on the speedometer.
- a – the centripetal force allows the car to turn around a corner as seen in figure 1.
- a – they are falling together so there is no normal force, gravity is still acting on them
- b, d – both apply
- C – The net force doesn’t change, it is the velocity in the y direction
Figure 1. Centripetal force acting on a car in circular motion