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Q. A 30 kg box is pushed by a horizontal force of 900. N as it slides up a plane inclined at an angle of 30 degrees with the horizontal. The coefficient of friction between box and plane is 0.20. How far-off will the box travel along the plane in 5.00 seconds if it starts from rest?

Q. A space vehicle is travelling at 4000km/h relative to the Earth while the exhausted rocket motor is disengaged and sent backward with a speed of 88km/h compared with the command module. The mass of the motor is four times the mass of the module. What is the speed of the command module relative to Earth after separation?

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