Calculate the change in potential energy of a 89.3 kg man when he takes an elevator...
Calculate the change in potential energy of a 89.3 kg man when
he takes an elevator from the first floor to 48th floor, if the
distance between floors is 4.53 m.
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Calculate the change in potential energy of a 89.3 kg man when
he takes an elevator...
Calculate the change in potential energy of a 87.2 kg man when he takes an elevator...
Calculate the change in potential energy of a 87.2 kg man when he takes an elevator from the first floor to 43th floor, if the distance between floors is 4.17 m.
Man in Elevator (c4p28) An 60- kg man stands in an elevator. What force does he...
Man in Elevator (c4p28) An 60- kg man stands in an elevator. What force does he exert on the floor of the elevator under the following conditions? The elevator is stationary. Subonit Anamer Tries 0/10 The elevator accelerates upward at 1.7 m/s2. Submit AnsmTries 0/10 The elevator rises with constant velocity of 4.1 m/s. While going up, the elevator accelerates downward at 1.7 m/s2. Suboni ApsaTries 0/10 The elevator goes down with constant velocity of 6.3 m/s. Submit AnseerTries 0/10
A 55 kg engineer leaves her office on the 33rd floor of a skyscraper and takes...
A 55 kg engineer leaves her office on the 33rd floor of a skyscraper and takes an elevator to the 59th floor. Later she descends to street level. If the engineer takes her office as the zero for potential energy and if the distance from one floor to the next is 3.5 m, what is the engineer’s potential energy (a) in her office, (b) on the 59th floor, and (c) at street level?
Consider a system of an 85.0-kg man, his 15.5-kg dog, and the earth. The gravitational potential...
Consider a system of an 85.0-kg man, his 15.5-kg dog, and the earth. The gravitational potential energy of the system increases by 2.25 times 10^3 J when the man climbs a spiral staircase from the first to the second floor of an apartment building. If his dog climbs a normal staircase from the same first floor to the second floor, by how much does the potential energy of the system increase?
A 72 kg man stands on a bathroom scale in an elevator. Starting from rest at...
A 72 kg man stands on a bathroom scale in an elevator. Starting from rest at the top floor, the elevator descends, attaining its maximum speed of 1.20 m/s in 0.80 s. It travels with this constant speed for the next 5.00 s. The elevator then slows down for 1.50 s and comes to rest at ground level. a)What is the acceleration of the man during the first 0.80 s? Answer in units of m/s2 and use the upward direction...
An elevator carries a group of people from the ground floor to the third floor of...
An elevator carries a group of people from the ground floor to the third floor of a building. The elevator and passengers have a combined mass of 2600 kg. The height of one floor is 4.5 m. If the elevator moves at a constant speed and goes from the ground floor to the third floor in one minute, calculate the work done on the elevator by gravity, the work done on the elevator by the cable, the kinetic energy of...
When an archer pulls an arrow back in his bow, he is storing potential energy in...
When an archer pulls an arrow back in his bow, he is storing potential energy in the stretched bow. (a) Compute the potential energy stored in the bow, if the arrow of mass 5.05 10-2 kg leaves the bow with a speed of 32.0 m/s. Assume that mechanical energy is conserved. (b) What average force must the archer exert in stretching the bow if he pulls the string back a distance of 30.0 cm?
4 4. An 80-kg man stands in an elevator. What is his apparent weight when 1)...
4
4. An 80-kg man stands in an elevator. What is his apparent weight when 1) the elevators stationary, IT) the elevator accelerates up at 2 m/s?. III) the elevator accelerates down at 2 m/s IV) the elevator cruises up at constant velocity of 1 m/s. A) Draw a free body diagram of the man labeling the two forces (n and weight) acting on him. B) Write Newton's 2nd law, just including the vertical components. C) Put the forces n...
A 68-kg man stands on a spring scale in an elevator. Starting from rest, the elevator...
A 68-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.77 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest. (a) What does the spring scale register before the elevator starts to move? N (b) What does the spring scale register during the first 0.77 s of the elevator's ascent?...
A skyscraper in Manhattan has an elevator that weighs 1000 kg when loaded. The elevator is...
A skyscraper in Manhattan has an elevator that weighs 1000 kg when loaded. The elevator is lifted at a constant rate to 480m above the ground by an electric winch motor. The drum of the winch motor is a solid uniform cylindrical drum in which a steel cable can wrap around it. The mass of the drum is 500 kg and has a diameter of 1 m. It takes the elevator a total of 120 s to get to the...
Man in Elevator (c4p28) An 60- kg man stands in an elevator. What force does he exert on the floor of the elevator under the following conditions? The elevator is stationary. Subonit Anamer Tries 0/10 The elevator accelerates upward at 1.7 m/s2. Submit AnsmTries 0/10 The elevator rises with constant velocity of 4.1 m/s. While going up, the elevator accelerates downward at 1.7 m/s2. Suboni ApsaTries 0/10 The elevator goes down with constant velocity of 6.3 m/s. Submit AnseerTries 0/10
Consider a system of an 85.0-kg man, his 15.5-kg dog, and the earth. The gravitational potential energy of the system increases by 2.25 times 10^3 J when the man climbs a spiral staircase from the first to the second floor of an apartment building. If his dog climbs a normal staircase from the same first floor to the second floor, by how much does the potential energy of the system increase?
4
4. An 80-kg man stands in an elevator. What is his apparent weight when 1) the elevators stationary, IT) the elevator accelerates up at 2 m/s?. III) the elevator accelerates down at 2 m/s IV) the elevator cruises up at constant velocity of 1 m/s. A) Draw a free body diagram of the man labeling the two forces (n and weight) acting on him. B) Write Newton's 2nd law, just including the vertical components. C) Put the forces n...
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