PHY101 Assignment 1 Solution Spring 2017
#1
Physics - PHY101 Assignment 1 Solution - Semester: Spring 2017


Question. No: 1
Solution:

a) In an elastic collision between two particles, does the kinetic energy of each particle change as a result of the collision?
Answer: No, the kinetic energy is conserved in an elastic collision. 

b) Three balls  are  thrown  into  the  air  simultaneously.  What  is  the  acceleration  of  their  center  of mass while they are in motion?
Answer: As the acceleration will be due to gravity, so it will be 9.8 m/s^2.

c) The Moon revolves around the Earth. Model its orbit as circular. Is the Moon's linear momentum
conserved? Is its kinetic energy conserved?

Answer: Linear momentum will change as the direction in circular motion keeps changing. Kinetic energy will be conserved as K.E = 1/2mv^2. 

Question. No: 2
Solution:

a) Does a large force always produce a larger impulse on an object than a smaller force does? Explain
Answer: No a larger force does not always produce a larger impulse. Impulse is defined as net force applied times the length of time over which that force is applied = F(delta)t. So if a larger force is applied for a shorter time, it will not necessarily  be greater than a smaller force applied for a longer time. 

b) When a particle rotates in a circle, a force acts on it directed toward the center of rotation. Why is it that, this force does no work on the particle?
Answer: In centripetal force the direction of velocity is perpendicular to the direction of force, and as work done W=Fdcos(theta), and cos90 = 0, so W = 0 and hence no work is done. 

Question. No: 3
A  number of sphere of pure (Pb) are found to have a  mass of 13.56 grams. The  lead (Pb) is then placed into graduated cylinder containing 3.0 millimeters of water, and the water is displaced to the level shown in the diagram. Which statement below is true?

a) The lead has a volume of 4.2 millimeters and a density of about 3.2 g/ml.
b) The lead has a volume of 1.2 millimeters and a density of about 11 g/ml.
c) The lead has a volume of 4.4 millimeters and a density of about 3.1 g/ml.
d) The lead has a volume of 1.4 millimeters and a density of about 9.7 g/ml.
e) The volume of the lead cannot be determined because the water level in the graduated cylinder is curved.

Answer: Correction option is b.
Explanation: As we can see from the figure, volume level increases from 3.0 millimeters to 4.2 millimeters, so volume of lead is 4.2 - 3 = 1.2 millimeters. And formula to calculate density is D = m/v, so 13.6/1.2 = 11.3 g/ml.


Find this helpful? Please like our page https://www.facebook.com/forumvu and share with friends. 
Thank you
#2
Thank you very much for sharing, great solution.
  


Possibly Related Threads...
Thread Author Replies Views Last Post
  MCM301 GDB Solution Spring 2018 Pakistani 0 375 08-15-2018, 10:44 AM
Last Post: Pakistani
  MCM301 Assignment 2 Solution Spring 2018 Admin 1 799 07-31-2018, 05:41 PM
Last Post: Vustudent
  PHY101 Assignment 1 Solution Spring 2018 Admin 2 1,718 07-28-2018, 11:24 PM
Last Post: Admin
  STA301 Assignment 2 Solution Spring 2018 Admin 0 752 07-27-2018, 10:01 PM
Last Post: Admin
  PAK301 Assignment 2 Solution Spring 2018 Pakistani 0 3,922 07-23-2018, 07:41 PM
Last Post: Pakistani
  MCM401 Assignment 1 Solution Spring 2018 Pakistani 0 1,019 05-25-2018, 11:35 PM
Last Post: Pakistani
  Eco401 assignment solution Rubaisha(Moody Girl) 1 2,415 05-22-2018, 09:06 PM
Last Post: Arbaz Mughal
  PSY404 Assignment 1 solution needed for PGD spring 2018 ali3366 2 1,320 05-21-2018, 10:15 PM
Last Post: Admin
  MCM101 Assignment 1 Solution Spring 2018 Pakistani 0 1,184 05-21-2018, 09:08 AM
Last Post: Pakistani
  PSY502 Assignment 1 solution needed for PGD spring 2018 ali3366 0 1,331 05-20-2018, 12:35 AM
Last Post: ali3366



Users browsing this thread:
1 Guest(s)