Problem_Set_5

# Problem_Set_5 - Problem Sheet 5 GE 208K 1 A 4.00 kg ball...

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Problem Sheet 5: GE 208K 1. A 4.00 kg ball has velocity of 4.00i m/s at one instant. 8 seconds later its velocity is (8.00i+10.00j) m/s. Find the components of force and its magnitude. 2 A 3.00 kg object undergoes an acceleration given by a = (2.00i +5.00j) m/s 2 . Find the resultant force acting on it and the magnitude of the resultant force. 3 The average speed of a nitrogen molecule in air is about 6.70*10 2 m/s, and its mass is about 4.68*10 -26 kg. Find a. It it takes 3.00*10 -13 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in the opposite direction, what is the average acceleration of the molecule in the time interval? b. What is the average force exerted by the molecule on the wall? 4 An electron of mass 9.11 x 10 -31 kg has an initial speed of 3.00 x 10 5 m/s. It travels in a straight line and its speed increases to 7.00 x 10 5 m/s in a distance of 5.00 cm. Assuming its acceleration is constant, a. Determine the force exerted on the electron and

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## This note was uploaded on 03/22/2010 for the course PHYS 303k taught by Professor Tsoi during the Spring '10 term at University of Texas-Tyler.

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Problem_Set_5 - Problem Sheet 5 GE 208K 1 A 4.00 kg ball...

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