Question 192: Centre of Mass and Rotational Motion

Question

A sphere of mass 2 kg and radius 0.5 m is rolling with an initial speed of 1 ms
-1
goes up an inclined plane which makes an angle of 30$$^\circ$$ with the horizontal plane, without slipping. How long will the sphere take to return to the starting point A?

Accepted Answer

$$a = {{g\sin 	heta } \over {1 + c}}$$
$$a = {{9.8\sin 30^\circ } \over {1 + {2 \over 5}}}$$
a = 3.5 m/sec
2
Time of accent
V = u + at
0 = 1 $$-$$ 3.5 t
$$t = {1 \over {3.5}}$$ sec.
Time of decent
$$t = {1 \over {3.5}}$$ sec.
Total time $$T = {2 \over {3.5}}$$ = 0.57 sec.

Answer

0.60 s

Answer

0.52 s

Answer

0.80 s

Answer

0.57 s

Centre of Mass and Rotational Motion

A sphere of mass 2 kg and radius 0.5 m is rolling with an initial speed of 1 ms -1 goes up an inclined plane which makes an angle of 30$^\circ$ with the horizontal plane, without slipping. How long will the sphere take to return to the starting point A?

Choose the correct answer: