Astudent of mass m = 78 kg takes a ride in a frictionless loop-the-loop at an amusement park. the radius of the loop-the-loop is r = 20 m. the force due to the seat on the student at the top of the loop-the-loop is fn = 364 n and is vertically down. what is the apparent weight of the student at the bottom of the loop-the-loop?

Explanation:

given,

mass M = 78 kg

radius of loop R = 20 m

F n = 364 N

now using newton's second law

u = 17 m/s

using equation of motion

v² = u² + 2 ah

h = 2 × radius of loop

h = 2 × 20 = 40 m

v² = 17² + 2 × 9.8 × 40

v = 32.76 m/s

Apparent weight

W = 4949.94 N

hence, the apparent weight is W = 4949.94 N

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

d) physical means can be used to separate the components of air.