Saturday, 1 December 2012
Don’t wait for the last date to submit your assignment.
Question # 1
In one experiment, a redwagon at rest is pushed to the left with a force of 150N for 1.0s. In a
second experiment a bluewagon with the same mass as the redwagon is pushed from rest to the
left with a force of 150N for 2.0s. Which statement below is true? Marks = 7
(3+4)
a) The redwagon had a smaller impulse but a larger change in momentum than the blue.
b) The redwagon had a smaller impulse and a smaller change in momentum than the blue.
c) The redwagon had a same impulse and a same change in momentum as the blue.
d) The redwagon had a larger impulse but a smaller change in momentum than the blue.
e) The redwagon had the same impulse but a larger change in momentum than the blue.
*Write the reason of your above selected choice as well.
Physics (PHY101) VU of Pakistan
Question # 2
The light’s wavelength is 6.0×10
-7
m. The light completes 5.0 cycles in 10
-14
seconds. What is
the light’s wave speed? Marks = 5
Question # 3
A person takes a 2.0Kg mass and lifts it 0.50m above a table that is itself 1.0m above the floor.
The person then moves the mass 1.0m to the side so that it is directly over the floor, 1.50m
below. Which statement is true? Marks 7 (2+5)
a) The mass has 30.0J of Gravitational Potential Energy (GPE) relative to the floor.
b) The person did 10.0J of work in lifting the mass.
c) The mass has 10.0J of Gravitational Potential Energy (GPE) relative to the table.
d) The person did not work against gravity when moving the mass 1.0m to the side.
e) All of the above are true.
*Write the reason of your above selected choice as well.
Question # 4
If an object on a horizontal, frictionless surface is attached to a spring, displaced, and then
released, it will oscillate. If it is displaced 0.120 m from its equilibrium position and released
with zero initial speed, then after 0.800 s its displacement is found to be 0.120 m on the opposite
side, and it has passed the equilibrium position once during this interval.
Find (a) the amplitude; (b) the period; (c) the frequency. Marks = 6
