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Question for you guys, designed by myself
A bicycle moves round a turn with a constant speed. What two statements from the following explain the force acting on the bicycle and its direction of acceleration?
1 Since the speed is constant, there is no force acting on the cycle.
2 Since the speed is constant, there is no acceleration.
3 A force acts on the cycle towards the center of the round turn.
4 Acceleration acts towards the center of the round turn.
5 Acceleration and force both act perpendicularly to each other with acceleration being tangent to the round turn and force towards the center.
A) 1 and 2
B) 3 and 5
C) 2 and 3
D) 3 and 4
My guess is that the answer should be D.
3 because in circular motion there is always a force acting towards the center i.e the centripetal force.
4 because in circular motion the displacement is constantly changing i.e there is no fixed direction, so according to velocity = displacement/time taken, the velocity is also changing, hence further according to acceleration = change in velocity/time taken, there is also an acceleration acting. So constant change in displacement = constant change in velocity = constant acting of an acceleration.
Hope I'm right?
either way, nice question 
