On take off, you’ll notice loud noises as the pilots put extra thrust into the engines. This is so the aircraft has enough power to take off. The aircraft will quickly pick up speed and you’ll notice and feel a few loud bumps. This is the aircraft travelling over the cats eyes which run down the middle of the runway, it’s a good indication that the aircraft is going in a straight line! As the speed increases, you’ll notice the front of the aircraft lifts up and will be at an angle, this means you’ve taken off! When the aircraft has some height, you’ll hear a few noises such as the overheard lockers rumbling and feel some bumps as the wheels come up and fold into the aircraft.
At about 1,000 feet, the pilots will lower the nose of the aircraft and the engines will become quieter as they don’t need as much power. As you’re now in the air, the aircraft needs to move faster so the flaps and slats on the wings are put away to make the aircraft more aerodynamic. You may hear a whirring sound as this is done. More than likely, it may also feel a little bumpy but don’t worry about this, this is the aircraft just passing through the clouds and the aircraft will settle once it’s passed these.