Phy101 Assignment No. 1 Fall 2011 solution
Monday, October 31, 2011 Posted In PHY Edit ThisAssignment 1: (Fall 2011) Physics
PHYSICS (PHY101)
TOTAL MARKS: 20
Due Date: 31/10/2011
DON'T MISS THESE Important instructions:
• To solve this assignment, you should have good command over first 8 lectures.
• Upload assignments (Microsoft word) properly through LMS, (No Assignment will be accepted through email).
• Write your ID and name on the top of your solution file.
• All students are directed to use the font and style 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 avoid from unnecessary explanation, such superfluous explanation will reduce your number.
• Avoid copy/paste from internet etc, if found you will be graded as zero marks.
• 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 hand holding the apple lifts it upwards, applying a force of 10N. If the mass of the apple is 250g has a weight of 2.5N. Find the acceleration of the apple. Marks = 5
Q: 2:
A frog applies a constant force of 80N while pushing him up a hill, while gravity and legs friction cause a constant 80N force in the opposite direction. In this situation
a. the frog applied force of 80N means the frog must be accelerating
b. the net force on the frog is 0N, which means the frog is not accelerating
c. the combined force of gravity and legs friction means the frog must be decelerating
d. the frog can't be moving up the hill, because the forces on it are balanced.
Write the detail of your above choice as well. vusolutions Marks = 5
Q. 3:
If a motorcyclist is moving at 70 km/h and it rounds a corner, also at 70 km/h, does it maintain a constant speed, or a constant velocity? Explain your answer. Marks = 5
Question # 4
A Pakistani satellite moves in a straight line towards the north with a speed of 3 × 104m/s.It has subjected to different frictional forces (like air frication, gravity etc) acting on it. During a 5m displacement, vusolutions the total work done on the satellite is
(I) zero
(II) positive
(III) negative
(IV) insufficient information provided in question.
Justify your above selected choice as well. Marks = 5
Solution:
Solution:
