[قلوب ستار]

1-at t=0'a wheel rotating about a fixed axis at a constant angular acceleration has an angular velocity of 2'0 rad/s. Tow seconds later it has turned through 5'0 complete revolutions. What is the angular acceleration of this wheel?
1-17rad/s^2
2-14rad/s^2
3-20rad/s^2
4-23rad/s^2
5-13rad/s^2
2-A particale located at the position vector r=(i=j)m has aforce F=(2i+3j )n
acting on it . The torque about the origin is:
1- (1k)n.m
2-(5k)n.m
3-(1k)n.m-
4-(5k)n.m-
5-(2i+3j)n.m :fantastic_new::s_thumbup::a_plain111:

[heiji hattori]

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