Question

While driving fast around a sharp right turn, you find yourself pressing 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 in uniform 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 tangential velocity.

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 that counteracts 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 the center of the Earth.

the station is so far away from the center of the Earth.

Answer 1