An elevator starts from rest with a constant upward acceleration. It moves 5 m in the first 2 s. A passenger in the elevator is holding a 4 kg package by a vertical string. Find the tension in the string during the acceleration process in N.
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Knowledge Check
An elevator starts from rest with a constant upward acceleration it moves 2m in the first 0.6 second. A passenger in the elevator is holding a 3 kg package by a vertical string When the elevator is moving What is the tension in the string?
A
4 N
B
`62.7 N`
C
`29.4 N`
D
`20.6 N`
An elevator is accelerating upwards with a constant acceleration a ms^-2 . If a coin is dropped in it by a passenger, then.
A
the coin starts to fall downwards instantaneously as observed by the passenger.
B
the coin starts to fall downwards instantaneously as observed by a ground observer.
C
first, coin continues to move up with same acceleration of a `ms^-2` for some time and then starts falling with gravitational acceleration as observed by a ground observer.
D
None of these
An elevator is moving vertically up with a acceleration a the force exerted on the floor by a passenger of mass m is
A
mg
B
ma
C
mg - ma
D
mg + ma
RESNICK AND HALLIDAY-FORCE AND MOTION - I -PRACTICE QUESTIONS (Integer Type)
