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Because velocity is a vector and therefore has both magnitude and direction. Thus as the lorry is changing direction whilst travelling around the roundabout its velocity is also changing (velocity = displ...
Superimposition is when two transverse waves come together, and their frequencies cancel each other out. If the waves are completely superimposed, the resultant wave is 0.
as the acceleration is constant, to travel 1km=1000m, we use 1000 m =(1/2) (5 m/s^2)t^2, so t=sqrt(21000/5)=20 seconds
Momentum of an object is the product of its mass and velocity (p=m x v). Since mass is a scalar quantity and velocity is a vector quantity, we can derive that momentum must therefore be a vector quantity ...
At the drop height, the ball possesses 0J of Kinetic Energy (KE), and only possesses Gravitational Potential Energy(GPE). From GPE=mgh...GPE=O.5x9.91x10=49.05J. As it drops, its GPE decreases and its KE i...
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