Page 237 of your lab manual (lab 11) shows a figure of a cart being pulled up a

Question

Page 237 of your lab manual (lab 11) shows a figure of a cart being pulled up a ramp at constant velocity. This is done once with the force sensor and string pulling parallel to the track, and once pulling at an angle of 60 degrees with respect to the ramp as shown. We assume negligible friction. Which one or more of the choices is a quantity that does not change when the pull angle is changed? A) The total work done against gravity when the cart goes from the bottom of ramp to top B) The total change in potential energy when the cart goes from the bottom of ramp to top C) The force detected by the force sensor as the cart moves up the ramp D) The tension is the string as the cart moves up the ramp.

Explanation / Answer

As cart is moving in constant velocity acceleration is 0, so net force is zero, The tension is always same and is equal to mgsin60 so answer is D

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