Question

You're in a car with a helium balloon on a string that is tied to the floor. The windows are closed. When you step on the accelerator, what happens to the balloondoes it move forward, move backward, or stay put?

Answer 1

Answer:

The balloon will move backwards due to inertia of rest. The lower end of the string is attached to the floor, so it starts moving with the car.

But the upper part of the balloon is not in contact with the car and hence will go backwards relative to the car after the accelerator is pressed.

Hope you will be able to understand.