An elevator of total mass (elevator+ passenger) 3600 kg in moving up with a constant speed of 2 `ms^-1` . A frictional force of 1300 M opposes its motion. Determine the minimum power delivered by the motor to the elevator.

An elevator can carry a maximum load of 1800 kg (elavator + passengre) is moving up with a constant speed of 2 m s^(-1) .The frictional force opposing the motion is 4000 N.Determine the minimum power dilivered by the motor to the elevator in watts as well as in horse power.

The total mass of an elevator with a 80 kg man in it is 1000 kg. This elevator moving upward with a speed of 8 ms^-1 is brought to rest over a distance of 16 m. Calculate the force exerted on man by the elevator floor.

The total mass of an elevator with a 80 kg man in it is 1000 kg. This elevator moving upward with a speed of 8 ms^-1 is brought to rest over a distance of 16 m. Calculate the tension T in the cable supporting the elevator

A body of mass 0.40 kg moving initially with a constant speed of 10 m s^-1 to the north is subject to a constant force of 8.0 N directed towards the south for 30 s. Take the instant the force is applied to be t = 0, the position of the body at that time to be x = 0, and predict its position at t = -5 s, 25 s, 100 s.

A car of mass 1000 kg moves on a circular road with a speed of 20 ms^-1 . Its direction changes by 90^@ after travelling 628 m on the road. The centripetal force acting on the car is

A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15m s^-1 . How long does the body take to stop ?

An engine is attached to a wagon through a shock absorber of length 1.5 m. The system with a total mass of 50,000 kg is moving with a speed of 36 km h^-1 when the brakes are applied to bring it to rest. In the proces of the system being brought to rest, the spring of the shock absorber gets compressed by 1.0 m. If 90% of energy of te wagon is lost due to friction. calculate the spring constant.