Paper 5 May/June 2006 MATHEMATICH (9709/5) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

A block of mass $20{\text{ }}kg$ is pulled from the bottom to the top of a slope. The slope has length $10{\text{ }}m$ and is inclined at ${4.5^ \circ }$ to the horizontal. The speed of the block is $2.5{\text{ }}m{\text{ }}{s^{ - 1}}$ at the bottom of the slope and $1.5{\text{ }}m{\text{ }}{s^{ - 1}}$ at the top of the slope.
a) Find the loss of kinetic energy and the gain in potential energy of the block.
b) Given that the work done against the resistance…