While driving fast around a sharp right turn, you find yourselfpressing against the car door.
What is happening?
What is happening?
| The door is exerting a rightward force on you. |
| Centrifugal force is pushing you into the door. |
| Both of the above. |
Neither of the above. |
Which of the following point towards the center of the circle inuniform circular motion?
| Acceleration. |
| Acceleration, net force. |
| Velocity, acceleration, net force. |
| Velocity, net force. |
| Velocity, acceleration. |
The Moon does not crash into the Earth because:
| it is freely falling but it has a high tangentialvelocity. |
| the net force on it is zero. |
| it is beyond the main pull of the Earth's gravity. |
| it is being pulled by the Sun as well as by the Earth. |
In the International Space Station which orbits Earth,astronauts experience apparent weightlessness because
In the International Space Station which orbits Earth,astronauts experience apparent weightlessness because
| the station is kept in orbit by a centrifugal force thatcounteracts the Earth's gravity. |
| the station's high speed nullifies the effects of gravity. |
| there is no gravity in space. |
| the astronauts and the station are in free fall towards thecenter of the Earth. |
| the station is so far away from the center of the Earth. |
