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  1. 25( a ) Weight of the plank = 200kN Assume the density...the vertical = tan -1 (200 sin (60 deg) / 100) = 60 deg 26 ( a ) Tension of the rope to the weight = weight = 200N Tension of the rope to the...

  2. A is correct. B is incorrect. For A , weight = mass X acceleration due to gravity i.e. W = mg where g is the...

  3. ... .......................... /_____________ 1.( a ) The weight of the wooden block is 4X10...12-16 17:46:55 補充: the compoent of weight will also be downward 10N,finally there is a downward net force 20N acting...

  4. ( a ) weight of block = 5.4g N = 52.92 N... acting on the block = weight of block = 52.92 N (d) Pointing...apply the equation of motion to train B, a -ve sign should be given to a decceleration...

  5. ( a ) Moment given by the weight = 1 x 0.25 Nm = 0.25 Nm (b) Taking moment... given in the question that 1 kg has a weight of 10 N) (d) End A would tip up. It...

  6. 1. ( a )(i) weight of person = 50g N where g is the acceleration due to gravity (ii) ...50g N 2. Upthrust = 1.2 x 0.05g N = 0.06g N 3. ( a ) Weight = 7800 x (0.5^3)g N = 975g N (b) Upthrust = 0.5^3 x 1000g...

  7. 1. From fig( a ), weight of plank = 2x150 N = 300 N Let the reading on Q...

  8. ...force on the floor (you on floor) (this can be proved by standing on a weighting machine) this is the reaction force vice versa , when you travel from 9/F...

  9. ... MAGNET, correct? the problem of using such permanent magnet in a weight lifting machine is the magnetic force of such magnet is weak, hence...

  10. ...3. weight = force  因為 non-contact force = force of gravity = weight of an object  so, weight is a non-contact force