The stair stepper is a novel exercise machine that attempts to reproduce the work done against gravity by walking up stairs. with each step, brad (of mass 60 kg) simulates stepping up a vertical distance of 0.25 m with this machine. if brad exercises for 20 min per day with a stair stepper at a frequency of 60 steps per minute, what total work he does he do each day? the acceleration of gravity is 9.8 m/s 2 .
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Physics, 22.06.2019 09:30
How would a small bar magnet be oriented when placed at position x?
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Physics, 22.06.2019 12:20
Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)
Answers: 1
Physics, 22.06.2019 18:30
Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?
Answers: 3
Physics, 22.06.2019 22:00
Hat is the most commonly cited cause of occupational injuries in the healthcare sector? a. repositioning of patients b. manual pipetting c. slips and trips d. workplace violence
Answers: 3
The stair stepper is a novel exercise machine that attempts to reproduce the work done against gravi...
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