Assignment 2: (Spring 2014)
TOTAL MARKS: 30
Due Date: 26/05/2014
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Question. No: 1
A lift is filled with patients has a total mass of 2055 kg. As the lift begins to go up, the
acceleration is 0.75 m/s
. What is the tension in the rope that is lifting the lift? Validate your
solution as well. Marks 5
Question. No: 2
A man pushes a lawnmower with a force of 170 N at an angle of 37° down from the horizontal.
The lawn is 12.0 m wide and requires 16 complete trips across and back. How much work does
he do? Marks 6
Question. No: 3
A bus’s tire rotates at an initial angular speed of 20.5 rad/s. The driver accelerates, and after 4.5 s
the tire’s angular speed is 29.0 rad/s. What is the tire’s average angular acceleration during the
4.5 s time interval? Marks 7
Question. No: 4
An object’s momentum depends upon the object’s
a) mass, speed and acceleration.
b) mass, speed and direction of motion.
c) speed and acceleration.
d) velocity and direction of motion.
e) mass and acceleration.
Write the reason of your above selected choice as well. Marks 3+3 = 6
Question. No: 5
You drive a nail horizontally into a wall, using a 0.52 kg hammerhead. If the hammerhead is
moving horizontally at 4.5 m/s and in one blow drives the nail into the wall a distance of 2.9 cm,
determine the average force acting on
(a) the hammerhead
(b) the nail Marks = 6
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Koi idea solution ho to .......
yar koi last q kara 2 plzzzzzzzzzzzzzz
koi to assignment solution do
are you sure this is right answer
yaaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrrrrrrrr koi dai do na solution phy101???
tariq bhai please
in question no.2
use formula w=fdcosᶿ
angle and f are given in the question.. u can find D which is the total distance by multiplying total trips and width i.e 16x12=192.
put all the three values in the formula n just calculate
Two forces work on the elevator: gravity ( m g) in the direction of the acceleration, and T, the tension in the cable, in the direction opposite to the acceleration. That, and Newton's second law, gives
m g - T = m a
T = m ( g-a)
= 1000 kg* (9.8 m/s^2 - 1.8 m/s^2) = 8000 N
yes you are right
Assignment solution upload kro...
koi last question ki hint day day plz.