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1A mass of 60 kg is on the floor of a li...

1A mass of 60 kg is on the floor of a lift moving down. The lift moves at first with an acceleration of 3 `3m//sec^(2),` then with constant velocity and finally with a retardation of `3m//sec^(2),` Choose the correct options related to possible reactions exerted by the lift on the body in each part of the
(1) 408 N (2)500 N (3) 768 N (4) 508

A

1 ,2 and 3 are correct

B

1 and 2 are correct

C

1 and 2are correct

D

1 and 3 are correct

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