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1.    You drive a 6,000 kg boat due north, while the wind exerts a force of 600 N due south and the water

exerts a resistive force of 1,200 N due south. The generated force by the boat's engines is 4,200 N. Find the magnitude and direction of the boat's acceleration.

 

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2.     A machine accelerates a 5 kg missile from rest to a speed of 5 km/s. The net force accelerating the missile 500,000 N. How long does it take to arrive at the speed of 5 km/s?

 

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3.    Peter found an amazing fact in an amusement park when he tried to ride the Magic Mountain Superman. Powerful magnets accelerate a car and its riders from zero to 45 m/s in 7 seconds. Suppose the mass of the car and riders is 5,600 kg. What is the average net force exerted on the car and riders by the magnets?

 

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4.    Two forces of 10 N and 30 N are applied to a 10 kg box. Find (1) the box's acceleration when both forces point due east and (2) the box's acceleration when 10 N force points due east and 30 N force points due west.

 

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Top Answer

1.The magnitude of the boat's acceleration ( a ) a = 0 . 4 m / s 2 The positive sign of acceleration... View the full answer

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