A statue with a mass of 103.1 kg is being lifted by a crane attached to...
A crane is being used to lift a container onto a cargo ship. The crane initially lifts the container up with a constant positive (upwards is positive) acceleration, a l i f t . The crane then reduces the tension in the cable so that the container slows to a stop with a constant negative (downward) acceleration, a s t o p = - 3 a l i f t . Assume the acceleration goes directly from upwards to downwards...
A 1500-kg air conditioning unit is being lifted by a crane onto the roof of a building. The unit starts on the ground and is raised straight up to a height of 12.0 m by a cable attached to the crane. The tension in the cable during the lift is 1.54 × 104 N. (Reminders: a free body diagram will probably be helpful, and work can be positive or negative.) (a) How much work is done on the air conditioning...
A crane is being used to lift a container onto a cargo ship. You need to program the crane so that it lifts the container with a constant positive acceleration, a, during the first half of the lift and with a constant negative acceleration of the same magnitude, -a, during the second half of the lift. You want to do this so that the maximum speed of the container during the lift is 8.1 m/s. The containers are initially at...
A crate with a mass of (12.5+A) kg is lifted by a crane. If the crate is accelerating upward at (B/10) m/s2, what is the tension in the cable? Give your answer in newtons (N) and with 3 significant figures. A= 10 B= 10
A crane is being used to lift a container onto a cargo ship. You need to program the crane so that it lifts the container with a constant positive acceleration, a, during the first half of the lift and with a constant negative acceleration of the same magnitude, -a, during the second half of the lift. You want to do this so that the maximum speed of the container during the lift is 7.85 m/s. The containers are initially at...
A crane is being used to lift a container onto a cargo ship. You need to program the crane so that it lifts the container with a constant positive acceleration, a, during the first half of the lift and with a constant negative acceleration of the same magnitude, -a, during the second half of the lift. You want to do this so that the maximum speed of the container during the lift is 7.90 m/s. The containers are initially at...
A= 32 B= 7 A crate with a mass of (12.5+A) kg is lifted by a crane. If the crate is accelerating upward at (B/10) m/s2, what is the tension in the cable? Give your answer in newtons (N) and with 3 significant figures.
A 8.5-kg box is being lifted by means of a light rope that is threaded through a single, light, frictionless pulley that is attached to the ceiling. (a) If the box is being lifted at a constant speed of 2.0 m/s, what is the power delivered by the person pulling on the rope? (b) If the box is lifted, at constant acceleration, from rest on the floor to a height of 1.3 m above the floor in 0.42 s, what...
You are using a rope to lift a 14.5 kg crate of fruit. Initially you are lifting the crate at 0.500 m/s. You then increase the tension in the rope to 190 N and lift the crate an additional 1.25 m. a) During this d motion, how much work is done on the crate by the tension force? b) Find the work done by the force of gravity. c) Find the work done by the net force? d) What is...