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  1. ...speed, the momentum of the car decreases and the friction of the tire to the road surface increases, so it is normal to feel that the steering is getting tight. That's...

  2. ...gravitational force on the puck by the earth is pulling the puck downward while the normal reaction on the puck by the ice surface is upward. They balance out each other. b) No, since both ...

  3. ... to the spherical nature, not all incoming solar rays are incident normal to the earth surface . The term pi.R^2 is the "effective catchment area" for these...

  4. ...resultant force on the wedge? (Since the floor is horizontal, its normal reaction is vertical in direction and hence its frictional force will be equal...

  5. ... on top of block B and there is friction between all contact surfaces . if we take both blocks as a system, then the external force is just the...

  6. ...a medium boundary at an angle larger than the critical angle with respect to the normal to the surface . If the refractive index is lower on the other side of the boundary...

  7. May I offer an alternative solution: Resolve the normal force N2 into vertical and horizontal components. The vertical component...

  8. 不是的,因為block有一個向下的acceleration,所以不是單單將block的weight加上wedge的weight就是reaction。 首先,對block來說,它在垂直於wedge面的方向是平衡狀態,因為它在這個方向並沒有加速,所以,reaction acting on the wedge by the block = mgcosx,設x為wedge的角度。 但是由於wedge會水平移動...

  9. ...and bench, the block is now in contact with a thin film of oil, not with the bench surface . Since the force required to start the block sliding when it...

  10. (1) (a) Let m be the mass of the particle and R be the normal reaction at the cone's inner surface as follows: 圖片參考:http://i117.photobucket.com/albums/o61/billy_hywung...

    分類:科學及數學 > 數學 2008年03月27日