K.C.S.E Physics Q & A - MODEL 2005PP2QN06

K.C.S.E Physics Q & A - MODEL 2005PP2QN06

​(a) Define the term angular velocity 
(b) A body moving with uniform angular velocity is found to have covered an angular distance of 170 radians in t seconds. Thirteen seconds later it is found to have covered a total angular distance of 300 radians. Determine t. 
(c) Fig 8 shows a body of mass m attached to the centre of a rotating table with a string whose tension can be measured. (The device for measuring the tension is not shown in the figure)

​The tension, T on the string was measured for various values of angular velocity, w. The distance r of the body from the centre was maintained at 30cm. Table 1 shows the results obtained.

(i) Plot the graph of T (y- axis against w²)
(ii) From the graph, determine the mass, m of the body given that
T = mw²–C
Where C is a constant
(iii) Determine the constant C and suggest what it represents in the set up.

answers