A 3.5 tonne truck accelerate from rest down an incline of 1 to 20 with the clutch disengaged. if the resistance to motion is 175 N/tonne. Dertermine its speed at the bottom of the 120m long incline. If it now ascends an incline of 1 to 40 , how far will it travel up the incline up the incline before it comes to rest?

A 3.5 tonne truck accelerate from rest down an incline of 1 to 20 with the clutch disengaged. if the resistance to motion is 175 N/tonne. Dertermine its speed at the bottom of the 120m long incline. If it now ascends an incline of 1 to 40 , how far will it travel up the incline up the incline before it comes to rest?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter9: Energy In Nonisolated Systems

Section: Chapter Questions

Problem 62PQ

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Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; the force which generates the motion is located in‑between the pivot point and the resistance force. The elbow acts as the pivot point, the biceps muscle pulls up on the forearm to move the mass which is held in the hand. Imagine someone is holding an object in her hand with her forearm horizontal and her upper arm vertical so her elbow creates a 90∘ angle. If her biceps attach to her forearm 0.0597 m from the elbow and make an angle of 30.0∘ with the vertical while a 2.76 kg mass is held in her hand 29.03 cm from the elbow, what force ? is exerted by the biceps muscle? Ignore the mass of the forearm.