Mass can be explained as _____
a) Amount of space
b) Amount of time
c) Amount of weight
d) Amount of matter

Answer

A, B, C, D

Explanation

Radius of the curves =100 m `
Weight = 100 kg
velocity = 18 km/hr=5m/sec
a. At B, mg-(mv^2)/r=N`
`rarrN=(100xx10)-(100xx25/100)`
`=1000-25=975N`
At D,` N=mg+(mv^2)/R`
`=1000+25=1025N`
b.At B & D, the cycle has no tendency to slide.
So at B & D frictioN/Al is zero. At C `mg sintheta=f`
`rarr 1000xx(1/sqrt2)=707N`
`c.i Before C mg costheta-N=(mv^2)/r`
`rarr N=mgcostheta-(mv^2)/r`
=707-25=682N`
ii. `N-mgcostheta=(mv^2)/r`
`rarr N=(mv^2)/r+mgcostheta`
`=25+707=732N`
d. To find out the minimum desired coefficient of frictionwe have to consider a point just before c (where N is minimum).
NOw `muN=mg sintheta`
`rarr muxx682=707`
So, `mu=1.037`