Objects fall at the same velocity regardless of their weight, if gravity is the only force acting upon them. In a vacuum, where air resistance has been eliminated, a bowling ball and a feather fall at the same speed.
A falling object accelerates at a constant rate due to the gravitational force of the earth. If there were no air resistance, an object would continue accelerating at the same rate until it hits the ground. However, the presence of air means the object is constantly colliding with countless air molecules. These accumulated collisions create resistance, and gradually slow the falling object until it reaches the point where the force of gravity and the force of air resistance are equal. At this point the object falls at a constant speed which is known as the "terminal velocity."Learn More
Acceleration is a vector quantity, which means that it has both a direction and a magnitude. Acceleration is the rate at which the velocity of an object changes. Velocity is also a vector and also has a direction.Full Answer >
A gyroscope sensor is a sensor on a mobile phone that tracks rotation or twist. The gyroscope is one of several sensors on a mobile phone that includes an accelerometer, a barometer and a compass.Full Answer >
The work output of a machine divided by the work input is the efficiency of the machine. Efficiency is typically stated as a percentage and is calculated by dividing work output by input and then multiplying by 100.Full Answer >
Friction makes the observation of Newton's first law difficult because it is an unseen force that interferes with the law. Newton's first law states that an object in motion continues its motion unless acted on by an unbalanced force. Friction is a contact force that opposes motion; an object in motion in a real-world scenario eventually slows down due to friction, even though it seems to slow down by itself.Full Answer >