A girl of mass 35 kg climbs up the stairs and reaches the roof at a height 6 m in 3 sec. g= 10 m/s² Find; 1. Force of gravity acting on the girl. 2. Workdone by her against gravity. 3. Power spent by her.

A girl of mass 35 kg climbs up the stairs and reaches the roof at a height 6 m in 3 sec. g= 10 m/s² Find; 1. Force of gravity acting on the girl. 2. Workdone by her against gravity. 3. Power spent by her.

Name: A girl of mass 35 kg climbs up the stairs and reachesthe roof at a he
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: A girl of mass 35 kg climbs up the stairs and reachesthe roof at a height 6 m in 3 sec. g= 10 m/s² Find;1. Force of gravity acting on the girl.2. Workdone by her against gravity.3. Power spent by her.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 2PE: A 75.0-kg person climbs stairs, gaining 2.50 meters in height. Find the work done to accomplish this...

See similar textbooks

Similar questions

Check Your Understanding Estimate the power expended by a weightlifter raising a 150-kg barbell 2 m in 3 s.
A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30s?
An electric scooter has a battery capable of supplying 120 Wh of energy. If friction forces and other losses account for 60.0% of the energy usage, what altitude change can a rider achieve when driving in hilly ter-rain if the rider and scooter have a combined weight of 890 N?
A 75.0-kg person climbs stairs, gaining 2.50 meters in height. Find the work done to accomplish this task.
A 75.0-kg person climbs stairs, gaining 2.50 m in height. Find the work done to accomplish this task.
Give an example of a situation in which there is a force and a displacement, but the force does no work. Explain why it does no work.
Discuss the work done by a pitcher throwing a baseball. What is the approximate distance through which the force acts as the ball is thrown?
A particle of mass 2.0 kg moves under the influence of the force F(x)=(5x2=7x)N . Suppose a frictional force also acts on the particle. If the particle’s speed when it starts at x=4.0 m is 0.0 m/s and when it arrives at x=4.0 m is 9.0 m/s, how much work is done on it by the frictional force between x=4.0 m and x=4.0 m?
A baseball of mass 0.25 kg is hit at home plate with a speed of 40 m/s. When it lands in a seat in the left-field bleachers a horizontal distance 120 m from home plate, it is moving at 30 m/s. If the ball lands 20 m above the spot where it was hit, how much work is done on it by air resistance?
Describe the energy transfers and transformations for a javelin, stating from the point at which an athlete picks up the javelin and ending when the javelin is stuck into the ground after being thrown.
Explain why it is easier to climb a mountain on a zigzag path rather than one straight up the side. Is your increase in gravitational potential energy the same in both cases? Is your energy consumption the same in both?
A certain automobile engine delivers 2.24 104 W (30.0 hp) to its wheels when moving at a constant speed of 27.0 m/s ( 60 mi/h). What is the resistive force acting on the automobile at that speed?