Page 1 - System HA#141507070121

Home assignment:

1 The point of a system where an applied force causes the system to move without
rotation is termed as
a) friction

b) center of gravity
c) center of a mass
d) intersection point

2 If the force is applied at the center of mass then torque is

a) maximum
b) zero

c) 1
d) infinity

3 Point where force causes system to move without rotation is

a) center of mass
b) mid point of body
c) edge of the body
d) none of above

4
The stationary sail boat air is blown at the sails from a fan attached to the boat. The boat will
:

(a) move in the direction opposite to that in which air is blown

(b) move in the direction in which air blown

(c) spin around
(d) remain at rest

5 A system consisting of two objects has a total momentum of (18 kgm/sec)i and its center of
mass has the velocity of (3 m/s)i.One of the object has the mass 4 kg and velocity (1.5

m/s)i.The mass and velocity of the other
objects are
(a) 2 kg, (6 m/s)i (b) 2 kg, (-6 m/s)i
(c)2 kg, (3 m/s)i (d) 2 kg, (-3 m/s)i