34A Find elastic force and equate to centripetal force
35C The resultant force is centripetal force
36C The resultant force is centripetal force
37D W = force x distance moved in dir of force , change in linear momentum is a vector subtraction.
38D Use the formula F = mw2r and mv2/r, the first formula for angular freq w and the second formula for speed
39A The horizontal component of force for centripetal force and the vertical component to balance the weight.
40D Write the formula F = mv2/r twice and divide (1) by (2)
41B Ise loss in PE = gain in KE but the v must satisfy the limiting speed square root of rg.
42A Gravitational force provide for centripetal force
43C Gravitationl force is the centripetal force.
