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Physics

What is the momentum of a 0.04kg bullet moving north at a rate of 1500m/s?

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Physics

The ball dropped at 7m building has a velocity of 2.5m/s, it reaches the ground at

10.2s? What is the distance travelled by the ball?

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A simple diagram of a step down transformer showing the core ,primary winding and secondary winding

Physics

A 60N motor winds a cable around a drum. (I) If the cable lifts a 3-ton load of bricks to a height of 12cm in 5 sec, calculate the efficiency of the motor. (II) At what rate is work done against friction?