subject
Physics, 22.02.2020 04:06 tyjae1601

A rocket of initial mass 115 kg (including all the contents) has an engine that produces a constant vertical force (the thrust) of 1930 N . Inside this rocket, a 18.5-N electrical power supply rests on the floor.

A) Find the initial acceleration of the rocket.

B) When the rocket has reached an altitude of 120 m, how hard does the floor push on the power supply? Neglect the air resistance.

ansver
Answers: 2

Another question on Physics

question
Physics, 21.06.2019 22:30
Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter
Answers: 1
question
Physics, 22.06.2019 01:50
Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.
Answers: 2
question
Physics, 22.06.2019 06:00
What are atoms of the same element with varying number of neutrons
Answers: 3
question
Physics, 22.06.2019 14:20
A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.
Answers: 3
You know the right answer?
A rocket of initial mass 115 kg (including all the contents) has an engine that produces a constant...
Questions
question
Mathematics, 08.12.2020 20:30
question
Mathematics, 08.12.2020 20:30