555555拜托了,我要死了...不用任何过程,只需要最后答案的数据...小女子没什么分数了,十万火急,只能以身相许,以求回报...55555551.A force of 35 N is required to start a 5 kg box moving across a horizontal concrete
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555555拜托了,我要死了...不用任何过程,只需要最后答案的数据...小女子没什么分数了,十万火急,只能以身相许,以求回报...55555551.A force of 35 N is required to start a 5 kg box moving across a horizontal concrete
555555拜托了,我要死了...
不用任何过程,只需要最后答案的数据...
小女子没什么分数了,十万火急,只能以身相许,以求回报...5555555
1.A force of 35 N is required to start a 5 kg box moving across a horizontal concrete floor.What is the coefficient of static friction between the box and the floor?
2.A helicopter accelerates upward,away from the surface of the earth,at 0.6 m/s2 while lifting a 1,375 kg car.What is the tension in the cable (ignore the cable's mass),in N,that connects the car to the helicopter?
3.An elevator is travelling upwards at a constant acceleration of 2.4 m/s2.If a 89 kg person in the elevator is standing on a bathroom scale,what would they measure as their apparent weight (in N)?
4.If you were standing 2.5 m from the centre of a circular platform which was rotating at a frequency of 19 rev/min,what would be your radial acceleration (in m/s2)?
5.Suppose that a new asteroid were discovered at a distance away from the Sun 11.4 times the distance from the Earth to the Sun.Assuming the asteroid travels in a circular orbit around the Sun,what would its orbital period be in Earth years?
555555拜托了,我要死了...不用任何过程,只需要最后答案的数据...小女子没什么分数了,十万火急,只能以身相许,以求回报...55555551.A force of 35 N is required to start a 5 kg box moving across a horizontal concrete
1、0～0.7
2、14300N
3、1085.8N
4、0.250694m/s2
5、38.4908300768年.