A small block of mass m is sliding around a frictionless, vertically oriented lo

Question

A small block of mass m is sliding around a frictionless, vertically oriented loop of radius r at a constant speed of 3gr where acceleration due to gravity is g. What is the magnitude of the normal force acting on the block when it is at the top of the loop?

a. mg

b. 2mg

c. 3mg (answer is not C)

d. 4mg

e. 9mg

f. None of the above

15. Multiple Choice. A small block of mass m is sliding around a frictionless, vertically oriented loop of radius r at a constant speed of V3gr where acceleration due to gravity is g. What is the magnitude of the normal force acting on the block when it is at the top of the loop? a. mg. b, 2mg C 3mg. d, 4mg e 9mg. None of the above. 1. 16. The image below depicts a car traveling around a curve in a road, as seen from above (the arrow shows the direction of the car's motion), As the car travels around this curve, In nraw and label vectors representing the velocity and acceleration of

Explanation / Answer

here,

the speed of block is v = sqrt(3* g * r)

the magnitude of the normal force acting on the block when it is at the top of the loop , N = m * v^2 /r - mg

N = m * 3 * g * r /r - m * g

N = 2 * m * g

the magnitude of the normal force acting on the block when it is at the top of the loop is b) 2mg

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