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1)If two vectors have the same magnitude (size) and the same direction, then we call them equal to each other...
The resultant vector is the single vector whose effect is the same as the individual vectors acting together. ... The resultant force will be the sum of your two applied forces in that direction. In the second case (on the right), the forces are applied in opposite directions...
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2)The main rotor creates lift by re-directing the flow of air downward. Due to the torque produced by the spinning main rotor, the helicopter's fuselage (body) would rotate the opposite way until it reaches a speed which equal and opposite to the torque...
3)Yes , speed of sound waves depend on temperature but speed of light waves does not.As we know speed of the light is constant everywhere and in medium it becomes c/n where n is the refractive index of that medium. Also , sound travels by the vibrations of the molecule in any medium..
4)The principle of work and kinetic energy (also known as the work-energy theorem) states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. ... Kinetic Energy: A force does work on the block....
5)A collision in which the objects stick together is sometimes called “perfectly inelastic.” Figure 8.8 An inelastic one-dimensional two-object collision. Momentum is conserved, but internal kinetic energy is not conserved. (a) Two objects of equal mass initially head directly toward one another at the same speed.
6)The theorem of parallel axis states that the moment of inertia of a body about an axis parallel to an axis passing through the centre of mass is equal to the sum of the moment of inertia of body about an axis passing through centre of mass and product of mass and square of the distance between the two axes...
7)A body or object upwards at an angle theta other than 90° with horizontal is called projectile. ♤Let projectile is thrown with a initial velocity u at an angle theta there with horizontal. This equation represents equation of parabola. Hence path of projectile(Trajectory) is a parabola...
The time of flight of an object, given the initial launch angle and initial velocity is found with: T=2visinθg T = 2 v i sin . The angle of reach is the angle the object must be launched at in order to achieve a specific distance: θ=12sin−1(gdv2) θ = 1 2 sin − 1 ( gd v 2 ) .....
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