A cyclist is travelling on a circular section of highway of radius 2500 ft at the speed of 60 mile h−1 . The cyclist suddenly applies the brakes causing the bicycle to slow at constant rate. Knowing that after 8 s the speed has been reduced to 45 mile h −1 . The acceleration of the bicycle immediately after the brakes have been applied is

Question : A cyclist is travelling on a circular section of highway of radius 2500 ft at the speed of 60 mile h−1 . The cyclist suddenly applies the brakes causing the bicycle to slow at constant rate. Knowing that after 8 s the speed has been reduced to 45 mile h −1 . The acceleration of the bicycle immediately after the brakes have been applied is

(A) 2t/s^{2}

(B) 4.14ft/s^{2}

(C) 3.10ft/s^{2}

(D) 2.75ft/s^{2}

Answer : option (B)

Solution :

A cyclist is travelling on a circular section of highway of radius 2500 ft at the speed of 60 mile h−1 . The cyclist suddenly applies the brakes causing the bicycle to slow at constant rate. Knowing that after 8 s the speed has been reduced to 45 mile h −1 . The acceleration of the bicycle immediately after the brakes have been applied is
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