Assignment 1: (Fall 2013)
TOTAL MARKS: 30
Due Date: 28/11/2013
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Question # 1
A juggler (as shown above) throws each ball so it hangs in the air for 1.60seconds before landing in the other hand, 75cm away. What are the initial vertical and horizontal velocity components?
Marks = 8
Question # 2
When do you usually drop a ball from a certain height it accelerates downwarrd at 9.8 m/s2? If you instead throw it downward, then its acceleration instantly after deparrture your hand,
assuming no air resistance, is? Marks = 4
Question # 3
The 7- ball is traveling to the rig ht above strikes the 9-ball, which is of equal mass and moving to the left with a smaller velocity. Which statement below is true? Marks = 3+4 = 7
a) Before the collision, the momentum magnitudes of the two balls are equaal.
b) After the collision, the momentum magnitudes of the two balls are equal.
c) The total amount of momentum before and after the collision is same.
d) During the collision, the amount of force that the two balls apply to eaach other will be unequal.
e) The change in momentum of the two balls during the collision is differennt.
Write the reason of your above selected choice as well.
Question # 4
In which type of frame of reference Newton s laws holds. Give your opinion about the Earth, Either it is inertial or non inertial. Marks = 4
The coefficient of kinetic friction is 0.300. What is the magnitude of the tension force in the rope (shown in the figure)? Marks = 7