Physics problems.A compound machine used to raise heavy boxes consists of a ramp and a pulley.The efficiency of pulling a 100-kg box up the ramp is 50%.If the efficiency of the pulley is 90%,what is the overall efficiency of the compound machine?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 00:29:36
![Physics problems.A compound machine used to raise heavy boxes consists of a ramp and a pulley.The efficiency of pulling a 100-kg box up the ramp is 50%.If the efficiency of the pulley is 90%,what is the overall efficiency of the compound machine?](/uploads/image/z/13716584-8-4.jpg?t=Physics+problems.A+compound+machine+used+to+raise+heavy+boxes+consists+of+a+ramp+and+a+pulley.The+efficiency+of+pulling+a+100-kg+box+up+the+ramp+is+50%25.If+the+efficiency+of+the+pulley+is+90%25%2Cwhat+is+the+overall+efficiency+of+the+compound+machine%3F)
Physics problems.A compound machine used to raise heavy boxes consists of a ramp and a pulley.The efficiency of pulling a 100-kg box up the ramp is 50%.If the efficiency of the pulley is 90%,what is the overall efficiency of the compound machine?
Physics problems.
A compound machine used to raise heavy boxes consists of a ramp and a pulley.The efficiency of pulling a 100-kg box up the ramp is 50%.If the efficiency of the pulley is 90%,what is the overall efficiency of the compound machine?
Physics problems.A compound machine used to raise heavy boxes consists of a ramp and a pulley.The efficiency of pulling a 100-kg box up the ramp is 50%.If the efficiency of the pulley is 90%,what is the overall efficiency of the compound machine?
90%x50%=45%