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Assignment 2: (Spring 2015)

PHYSICS (PHY101)

TOTAL MARKS: 0

Due Date: 11/06/2015

 

 

DON’T MISS THESE Important instructions:

 

      To solve this assignment, you should have good command over first 16 lectures.

      Upload assignments (Microsoft word) properly through LMS, (No Assignment will be     accepted through email).

      Write your ID on the top of your solution file.

      All students are directed to use the font and style (Time New Roman 12) of text as is used in this document.

      Don’t use colorful back grounds in your solution files.

      Use Math Type or Equation Editor etc for mathematical symbols.

      Write to the point and avoid from unnecessary explanation. Don’t copy/paste from internet or any other source.

      This is not a group assignment, it is an individual assignment so be careful and avoid copying others’ work. If some assignment is found to be copy of some other, both will be awarded zero marks. It also suggests you to keep your assignment safe from others. No excuse will be accepted by anyone if found to be copying or letting others copy.

 

Don’t wait for the last date to submit your assignment.

Question # 1

A 60.0Kg cannon attached to a cart with frictionless wheels contains a 6.0kg cannon ball, and is initially at rest. When the cannon is fired, the cannon ball moves in the positive x direction with a velocity of 120m/s. What is the velocity of the cannon?                                                     Marks 6

 

Question # 2

A student is riding a bicycle in one direction runs into a small insect that was flying in the opposite direction. Which statement is true?                                                                  Marks 3+5

a)      The student and insect will only exert equal forces on each other if they are going in opposite direction.

b)      The student and insect will only exert equal forces on each other according to Newton’ s 3rd law, but they don’t exert equal magnitudes of impulses on each other.

c)      The bug experienced a change in momentum that was bigger than that experienced by the student.

d)     The bug experienced a Force that was bigger than that experienced by the student.

e)      The bug experienced the same impulse that the student experienced.

Note: Select the best choice given above (a to e) according to your best of knowledge, and also write the reason of your above selected choice as well.

Question # 3

Which of the following statements regarding Isaac Newton and gravity is false? Marks 3+3

a)      Newton discovered the gravity.

b)      Newton developed the law of Universal Gravitation, which states all masses exert forces on each other.

c)      Newton published the law of Universal Gravitation in the Philosophiae Natuuralis Principia Mathematica.

d)     Newton published the law of Universal Gravitation without knowing what the value of the universal gravitation constant was.

e)      Newton determined that the relationship between Force of gravity and distance between masses in an inverse square.

Note: Select the best choice given above (a to e) according to your best of knowledge, and also write the reason of your above selected choice as well.

Question # 4

A satellite orbits the Earth at a certain distance, and is kept in orbit by the force of the Earth‘s gravity. When this same satellite is moved to a location that is twice as far away from the Earth? Discuss the effect of this separation on the force of gravitation.                                     Marks = 5

 

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