A cyclist intends to cycle up a 7.8o hill whose vertical height is 150m. Assuming the mass
Question:
A cyclist intends to cycle up a 7.8o hill whose vertical height is 150m. Assuming the mass of bicycle plus cyclist is 75kg, (a) Calculate how much work must be done against gravity. (b) If each complete revolution of the pedals moves the bike 5.1m along its path, calculate the average force that must be exerted on the pedals moves the bike 5.1m along its path calculate the average force that must be exerted on the pedals tangent to their circular path. Neglect work done by friction and other losses. The pedals turn in a circle of diameter 36 cm.
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In Physics, a force is an influence that can change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. In this video, the concept of force and torque is demonstrated with the practical application of changing the flat tire of the car.