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  1. ...the difference is only whether it is large or little. (a) The girl comes down the slide faster and faster means that energy give out from change...

  2. ...this K.E. to P.E.     When the small stone comes down to a height of 533 m. the P.E. gained returns back to...

  3. ....html y = (ut sin A) - ½ gt² y = max height before you come down u = initial velocity t = time from jumping to landing A = angle...

  4. ...same temperature, because conductivity of metal is higher. So all it comes down to whether you in direct contact with something or not. You don't &quot...

  5. Of course the student is wrong. When the trolley moves down along the inclined plane at uniform speed, the downward component of the trolley&...

  6. Let x be the required angles Horizontally, 2 = [6.8.cos(x)].t where t is the time of flight for the water in air t = 2/6.8cos(x) i.e. t = 1/3.4cos(x) Vertically, use s = ut + (1/2)at^2 with s = 0 m, u = 6.8.sin(x), a = -g(=-10 m/s^2), t = 1/3.4cos(x) hence, 0 = 6.8.sin(x)[1/3.4cos...

  7. ... .. when put upside down , pressure difference occurs, the ink will flow down by gravity. some air will goes into the bottom of the tube( on top now =.=)...when the pressure comes balance..the ink stop flowing and hence the pen comes to no use anymore

  8. ...a push, then the box will move ever so slightly and then gradually come to a halt. Since no description of the inclined..., the reader cannot assume the box would slow down gradually or quickly. One might even assume the box ...

  9. 1. By v = u + at v = 0 + 10(12) Speed, v = 120 ms-1 The answer is D. more than 100 ms-1. 2. By s = ut + 1/2 at2 0 = 10t + 1/2 (-10)t2 t2 - 2t = 0 t = 2s or 0 (rejected) So, the answer is D. 2 seconds. 3. The answer is...

  10. ... particles are unstable in high level, so it will fall down again. During the falling process, potential energy changes to kinetic...