An athlete whose mass is 86.0 kg is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 580 N . He lifts the barbell a distance of 0.70 m in a time of 1.4 s . Use Newton's laws to find the total force that his feet exert on the ground as he lifts the barbell. Express your answer using two significant figures.
Answers: 3
Physics, 21.06.2019 22:00, greenclonetroop6q2tg
Arock collection comes from which part of earth?
Answers: 1
Physics, 22.06.2019 20:20, SoccerHalo
The temperature in gavin's oven is a sinusoidal function of time. gavin sets his oven so that it has a maximum temperature of 280°f and a minimum temperature of 240°. once the temperature hits 280°, it takes 20 minutes before it is 280° again. gavin's cake needs to be in the oven for 30 minutes at temperatures at or above 270°. he puts the cake into the oven when it is at 260° and rising. how long will gavin need to leave the cake in the oven? (round your answer to the nearest minute.)
Answers: 3
Physics, 22.06.2019 21:40, lottie2306
Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.
Answers: 3
An athlete whose mass is 86.0 kg is performing weight-lifting exercises. Starting from the rest posi...
Physics, 08.04.2020 20:43
English, 08.04.2020 20:43
History, 08.04.2020 20:43