grade 9 motion problems

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Equations of Motion - The variable quantities in a uniformly accelerated rectilinear motion are time, speed, distance covered and acceleration. Simple relations exist between these quantities. These relations are expressed in terms of equations called equations of motion..

Let 'u' be the initial velocity of an object and a be the acceleration produced in the body. The distance travelled 's' in time 't' is given by the area enclosed by the v - t graph. S = area of the trapezium OABD. ..

. Speed is scalar quantity. SI unit of speed is m/s. Instantaneous speed: It is the speed which the body possesses at a particular instant of time. The speed of a moving object can be determined by calculating the slope of the S-t graph. The S-t graph tells us about the nature of motion. ..

Consider a particle moving along a straight line with uniform acceleration 'a'. At t=0, let the particle be at A and u be its initial velocity and when t = t, v be its final velocity. v = u + at I equation of motion..

Newton's Second Law of Motion - Earlier we have mentioned that application of force can change the velocity of the moving object. Let us suppose that a body of mass 'm' is moving with a velocity 'u'. When a force F is applied on the body for 't' seconds, the velocity changes from the init..