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S0 1 ISO 2Guns 2013Mx Guest portal ecure https:/ ucf.edu/courses/1267291/quizzes/1651738/take D Question 2 0.1 pts Guide A baseball and a basketball, having the same mass, are dropped through air from rest such bottoms are initially at the same height above the ground, on the order of 1m or more. Considering air resistance, which one strikes the ground first? that their O Both strike the ground at the same time O The baseball strikes the ground frst. O The basketball strikes the ground first O Need more information D Question 3 0.1 pts A cyclist in an Olympic race is moving in a circular track of radius 80 m with speed 72 km/h. He has to lean from the vertical approximately through an angle (use g- 10 m/s O tan 1(2). O tan 11/2) 30 deg 45 deg 20

Explanation / Answer

Q2. for baseball and basketball having same mass, and air resistance is not negligible

the basket ball faces more air resistance due to its bigger size and hence it loses more energy to friciton

hence the baseball moves faster with greater acceleration and strikes the ground first

-> The baseball strikes first

Q3. radius of track, r = 80 m

speed, u = 72 km/hr = 20 m/s

angvle with the vertical, theta = ?

when the cyclist leans

let the normal force be N

Ncos(theta) = mg

Nsin(theta) = mv^2/r

tan(theta) = v^2/rg = 20^2/80*9.81

theta = 27 deg wrt vertical = arctan(1/2)

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