What makes an airplane nose come off the ground,when itreach take off speed?

The air flys over the wings creating low presurre pushing the plane upwards. The nose goes up cause the bottem is tilted down

The aircraft is driven down the runway to a speed indicated by VR - Velocity of rotation The pilot then pulls back on the controlls causing the node of the aircraft to tilt upward increasing lift on the wings. At a slightly greater speed the aircraft will become airborne and gain altitude as long as the angle is maintained.

There are four basic forces acting on a moving plane. Lift pulls it up. Gravity pulls it down. Thrust pulls it forward. Drag pulls it back. When a plane reaches a high enough speed, like takeoff speed, enough lift is being generated to overcome the pull of gravity. The pilot pulls on the yoke at that time, and presto, the plane leaves the runway.

There are several speeds on the takeoff roll that are called out by the flight crew. One of them is called Vr (stands for rotate). That is the speed at which there is enough airflow over the main wings for flight (swept wing aircraft only). At that time the flying pilot increases the pitch of the elevator (horizontal wing in the back of the plane). This pitches the plane up thus increasing the angle of attack on the main wing causing it to increase lift and forces the plane to take flight.

There are three control attitudes of an aircrat in flight - Pitch (up and down), roll (dipping the wings left or right) and Yaw (left and right turns.) Airflow over the top curved surface of the wings creates negative air presuure which, when lift-off speed is attained, LIFTS the aircraft off of the ground. This, along with extending the slats (leading edge) and the flaps (trailing edge) of the wings to obtain maximum airflow, creates "pitch" - the 'nose-up, nose-down attitude of the aircraft. Approximately 30 degrees of pitch and approximately 150 miles per hour speed is required to gain altitude with a commercial jet aircraft.

When accelerating down the runway, the pilot-not-flying (PNF) makes the speed call outs. When the AC reaches the speed where it just about to fly, the PNF calls "V-one," and then "Rotate." The pilot who is actually flying the airplane, then pulls on the stick to raise the nose about 10 degrees. The plane then lift off the runway. Some planes with a bicycle landing gear like B-52 do not lift the nose, but rather lift up from the runway, almost levitate off the runway until they are high enough to raise the nose and not hit the ground with the tail. The V-one and Rotate speeds are calculated based on the AC weight, wind, field elevation, flap setting, etc.

Like other people have said on here, at a certain speed, the wing produces enough lift for the aircraft to take off, the critical part that they forgot to mention is that the horizontal stabilizer also produces lift in opposite direction to the wing (basically an upside down aerofoil). Therefore, when the pilot pulls back on the yoke (which raises the elevator) lift is created at the aft of the airplane, but instead of raising the tail, it pushes the tail down which lifts the nose off of the ground and the aircraft becomes airborne, hope this helps !

There are a lot of answers here so far and some are even correct. Simply put the pilot has a stick or yoke that controls the vertical movement and the roll of an aircraft. When there is sufficient wind over the wings from forward motion (or a strong enough natural wind) and the pilot pulls back on the yoke or stick the part of the aircraft called the elevator (a small wing on the tail) will cause the tail to go down and since the nose has to do something it will go up (the wheels are the pilot point when on the ground). So the short answer previously given is correct - the pilot controls this. As for all the other jargon about VR and all, while technically correct for a take off, the pilot can pull the nose off the ground long before you reach take off speed, but to do so make for more drag and a longer take off run. In fact, this is a common technique when landing in a fighter type aircraft. After landing the pilot pulls the nose very high off the ground and lets the air slow him down. This is called aerobraking.

When you have reached takeoff speed, the lift that is being created is greater than the weight of the aircraft. The nose comes up as the pilot pulls aft on the stick or control wheel. This aft movement of the stick moves a control surface called the elevator which actually moves the tail of the airplane down resulting in the nose of the airplane moving up.