1. A body mass 50 kg is being lifted by a lift in an office.
Find the force exerted by the body on the lift floor, when it is
moving with a uniform acceleration of 1.2 m/s2
2. In a factory, an elevator is required to carry a body of
mass 100 kg. What will be the force exerted by the body on the
floor of the lift, when (a) the lift is moving upwards with
retardation of 0.8 m/s2: (b) moving downwards with a retardation of
0.8 m/s2
3. An elevator is required to lift a body of mass 65 kg.
Find the acceleration of the elevator, which could cause a force of
800 N on the floor.
4. An elevator of mass 500 kg is ascending with an
acceleration of 3 m/s2. During this ascent, its operator whose mass
is 70 kg is standing on the scale placed on the floor. What is the
scale reading? What will be the total tension in the cables of the
elevator during this motion?
5. An elevator of mass 2500 kg is moving vertically
downwards with a constant acceleration. Starting from rest, it
travels a distance of 35 m during an interval of 10 seconds. Find
the cable tension during this time. Neglecting all other
resistances to motion, what are the limits of cable tension?